fixes

progress
2026-10-27 10:37:17 +00:00 · 2026-10-02 18:50:10 +02:00 · 2026-10-02 18:06:45 +02:00 · 2026-10-01 18:42:31 +02:00 · 2026-09-30 19:19:23 +02:00 · 2026-09-25 12:09:58 +02:00
1224 changed files with 57083 additions and 46155 deletions
@@ -1 +1 @@
-ko_fi: gpxstudio
+open_collective: gpxstudio
@@ -8,12 +8,12 @@ jobs:
        runs-on: ubuntu-latest
        steps:
            - name: Checkout
-        uses: actions/checkout@v4
+              uses: actions/checkout@v5

            - name: Install Node.js
-        uses: actions/setup-node@v4
+              uses: actions/setup-node@v6
              with:
-          node-version: 20
+                  node-version: 24
                  cache: npm
                  cache-dependency-path: |
                      gpx/package-lock.json
@@ -31,7 +31,7 @@ jobs:
            - name: Create env file
              run: |
                  touch website/.env
-          echo PUBLIC_MAPBOX_TOKEN=${{ secrets.PUBLIC_MAPBOX_TOKEN }} >> website/.env
+                  echo PUBLIC_MAPTILER_KEY=${{ secrets.PUBLIC_MAPTILER_KEY }} >> website/.env
                  cat website/.env

            - name: Build website
@@ -41,7 +41,7 @@ jobs:
                  npm run build --prefix website

            - name: Upload Artifacts
-        uses: actions/upload-pages-artifact@v3
+              uses: actions/upload-pages-artifact@v4
              with:
                  path: 'website/build/'

@@ -0,0 +1,3 @@
+website/src/lib/components/ui
+website/src/lib/docs/**/*.mdx
+**/*.webmanifest
@@ -0,0 +1,16 @@
+{
+	"useTabs": false,
+	"tabWidth": 4,
+	"singleQuote": true,
+	"trailingComma": "es5",
+	"printWidth": 100,
+	"overrides": [
+    {
+      "files": "**/*.svelte",
+      "options": {
+        "plugins": ["prettier-plugin-svelte"],
+		    "parser": "svelte"
+      }
+    }
+  ]
+}
@@ -0,0 +1,7 @@
+{
+    "recommendations": [
+      "esbenp.prettier-vscode",
+      "svelte.svelte-vscode"
+    ]
+  }
+  
@@ -0,0 +1,13 @@
+{
+    "editor.formatOnSave": true,
+    "[javascript]": {
+      "editor.defaultFormatter": "esbenp.prettier-vscode"
+    },
+    "[typescript]": {
+      "editor.defaultFormatter": "esbenp.prettier-vscode"
+    },
+    "[svelte]": {
+      "editor.defaultFormatter": "svelte.svelte-vscode"
+    }
+  }
+  
@@ -1,6 +1,6 @@
 MIT License

-Copyright (c) 2024 gpx.studio
+Copyright (c) 2026 gpx.studio

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -5,7 +5,7 @@

 [**gpx.studio**](https://gpx.studio) is an online tool for creating and editing GPX files.

-![gpx.studio screenshot](website/src/lib/assets/img/docs/getting-started/interface.png)
+![gpx.studio screenshot](website/src/lib/assets/img/docs/getting-started/interface.webp)

 This repository contains the source code of the website.

@@ -26,6 +26,7 @@ Any help is greatly appreciated!
 ## Development

 The code is split into two parts:
+
 - `gpx`: a Typescript library for parsing and manipulating GPX files,
 - `website`: the website itself, which is a [SvelteKit](https://kit.svelte.dev/) application.

@@ -41,11 +42,11 @@ npm run build

 ### Running the website

-To be able to load the map, you will need to create your own <a href="https://account.mapbox.com/auth/signup" target="_blank">Mapbox access token</a> and store it in a `.env` file in the `website` directory.
+To be able to load the map, you will need to create your own <a href="https://cloud.maptiler.com/auth/widget?next=https://cloud.maptiler.com/maps/" target="_blank">MapTiler key</a> and store it in a `.env` file in the `website` directory.

 ```bash
 cd website
-echo PUBLIC_MAPBOX_TOKEN={YOUR_MAPBOX_TOKEN} >> .env
+echo PUBLIC_MAPTILER_KEY={YOUR_MAPTILER_KEY} >> .env
 npm install
 npm run dev
 ```
@@ -57,10 +58,9 @@ This project has been made possible thanks to the following open source projects
 - Development:
    - [Svelte](https://github.com/sveltejs/svelte) and [SvelteKit](https://github.com/sveltejs/kit) — seamless development experience
    - [MDsveX](https://github.com/pngwn/MDsveX) — allowing a Markdown-based documentation
-  - [svelte-i18n](https://github.com/kaisermann/svelte-i18n) — easy localization
 - Design:
    - [shadcn-svelte](https://github.com/huntabyte/shadcn-svelte) — beautiful components
-  - [lucide-svelte](https://github.com/lucide-icons/lucide/tree/main/packages/lucide-svelte) — beautiful icons
+    - [@lucide/svelte](https://github.com/lucide-icons/lucide/tree/main/packages/svelte) — beautiful icons
    - [tailwindcss](https://github.com/tailwindlabs/tailwindcss) — easy styling
    - [Chart.js](https://github.com/chartjs/Chart.js) — beautiful and fast charts
 - Logic:
@@ -69,9 +69,10 @@ This project has been made possible thanks to the following open source projects
    - [fast-xml-parser](https://github.com/NaturalIntelligence/fast-xml-parser) — fast GPX file parsing
    - [SortableJS](https://github.com/SortableJS/Sortable) — creating a sortable file tree
 - Mapping:
-  - [Mapbox GL JS](https://github.com/mapbox/mapbox-gl-js) — beautiful and fast interactive maps
-  - [brouter](https://github.com/abrensch/brouter) — routing engine
-  - [OpenStreetMap](https://www.openstreetmap.org) — map data used by Mapbox and brouter
+    - [MapLibre GL JS](https://github.com/maplibre/maplibre-gl-js) — beautiful and fast interactive map rendering
+    - [GraphHopper](https://github.com/graphhopper/graphhopper) — powerful routing engine
+    - [OpenStreetMap](https://www.openstreetmap.org) — open map data used by most of the map layers, and by the routing engine
+    - [Mapterhorn](https://github.com/mapterhorn/mapterhorn) — high-quality open terrain data used by some map layers (including for 3D), and by the routing engine
 - Search:
    - [DocSearch](https://github.com/algolia/docsearch) — search engine for the documentation

@@ -0,0 +1,2 @@
+target/
+pkg/
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+
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@@ -0,0 +1,14 @@
+[package]
+name = "gpx-rs"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+chrono = "0.4.45"
+js-sys = "0.3.106"
+quick-xml = "0.42.0"
+uuid = {version = "1.26.1", features = ["v4", "js"]}
+wasm-bindgen = "0.2"
@@ -0,0 +1,3 @@
+```
+wasm-pack build --target bundler
+```
@@ -0,0 +1,274 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1"
+    xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd
+                        http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd
+                        http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd
+                        http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1"
+    creator="https://gpx.studio">
+    <metadata>
+        <name>simple</name>
+        <desc>description</desc>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio">
+                <text>link text</text>
+            </link>
+        </author>
+    </metadata>
+    <trk>
+        <name>track name</name>
+        <cmt>track comment</cmt>
+        <desc>track description</desc>
+        <src>track source</src>
+        <link href="https://gpx.studio">
+            <text>track link text</text>
+        </link>
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+                <ele>129.5</ele>
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+        </trkseg>
+    </trk>
+</gpx>
@@ -0,0 +1,660 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1" creator="https://gpx.studio">
+    <metadata>
+        <name>with_cad</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
+        </author>
+    </metadata>
+    <trk>
+        <name>with_cad</name>
+        <type>Cycling</type>
+        <trkseg>
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+                <ele>109.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
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+            </trkpt>
+            <trkpt lat="50.790714" lon="4.405036">
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+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
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+                    <gpxtpx:TrackPointExtension>
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+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783924" lon="4.407471">
+                <ele>106.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783837" lon="4.407486">
+                <ele>107.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783771" lon="4.407472">
+                <ele>108.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783697" lon="4.407428">
+                <ele>109.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783626" lon="4.407363">
+                <ele>110.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783548" lon="4.407274">
+                <ele>110.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783458" lon="4.407134">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783123" lon="4.406435">
+                <ele>111.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782982" lon="4.406168">
+                <ele>112.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782871" lon="4.406044">
+                <ele>113.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78279" lon="4.406021">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782714" lon="4.406018">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782607" lon="4.406047">
+                <ele>113.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782405" lon="4.406194">
+                <ele>114.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782175" lon="4.406413">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781749" lon="4.407018">
+                <ele>118.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781654" lon="4.407316">
+                <ele>119.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781563" lon="4.407764">
+                <ele>121.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781487" lon="4.407984">
+                <ele>122.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781422" lon="4.408216">
+                <ele>122.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781395" lon="4.408508">
+                <ele>123.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781399" lon="4.409114">
+                <ele>126.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781367" lon="4.409428">
+                <ele>128.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781286" lon="4.409607">
+                <ele>129.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78116" lon="4.409789">
+                <ele>130.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780804" lon="4.409993">
+                <ele>130.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780389" lon="4.410334">
+                <ele>131.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780232" lon="4.410563">
+                <ele>132.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780094" lon="4.410827">
+                <ele>132.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779723" lon="4.411582">
+                <ele>135.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779591" lon="4.411791">
+                <ele>135.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779125" lon="4.412435">
+                <ele>132.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.778676" lon="4.412979">
+                <ele>134.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.778194" lon="4.413466">
+                <ele>136.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777427" lon="4.414302">
+                <ele>137.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777165" lon="4.414736">
+                <ele>137.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776927" lon="4.415201">
+                <ele>137.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776778" lon="4.415613">
+                <ele>137.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776553" lon="4.416425">
+                <ele>134.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776326" lon="4.417304">
+                <ele>132.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>80</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776129" lon="4.418383">
+                <ele>129.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:cad>90</gpxtpx:cad>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+        </trkseg>
+    </trk>
+</gpx>
@@ -0,0 +1,660 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1" creator="https://gpx.studio">
+    <metadata>
+        <name>with_hr</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
+        </author>
+    </metadata>
+    <trk>
+        <name>with_hr</name>
+        <type>Cycling</type>
+        <trkseg>
+            <trkpt lat="50.790867" lon="4.404968">
+                <ele>109.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790714" lon="4.405036">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790336" lon="4.405259">
+                <ele>110.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790165" lon="4.405331">
+                <ele>110.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790008" lon="4.405359">
+                <ele>110.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789818" lon="4.405359">
+                <ele>109.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789409" lon="4.40534">
+                <ele>107.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789105" lon="4.405411">
+                <ele>106.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.788799" lon="4.405527">
+                <ele>108.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.788645" lon="4.405606">
+                <ele>109.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.7885" lon="4.405711">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78822" lon="4.405959">
+                <ele>112.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787956" lon="4.406092">
+                <ele>112.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787814" lon="4.406143">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787674" lon="4.406177">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787451" lon="4.406199">
+                <ele>115.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787297" lon="4.406177">
+                <ele>114.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78716" lon="4.406098">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787045" lon="4.405984">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786683" lon="4.405653">
+                <ele>114.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786538" lon="4.405543">
+                <ele>115.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78635" lon="4.405441">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786275" lon="4.40542">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786182" lon="4.405435">
+                <ele>116.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786121" lon="4.405475">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786042" lon="4.405558">
+                <ele>115.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785821" lon="4.405925">
+                <ele>114.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785672" lon="4.406119">
+                <ele>112.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785516" lon="4.406256">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785384" lon="4.406364">
+                <ele>109.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785126" lon="4.406475">
+                <ele>106.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784697" lon="4.406537">
+                <ele>104.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784591" lon="4.40657">
+                <ele>104.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784507" lon="4.406612">
+                <ele>103.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784435" lon="4.40669">
+                <ele>103.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784209" lon="4.407148">
+                <ele>103.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784162" lon="4.407257">
+                <ele>103.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784077" lon="4.407372">
+                <ele>104.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784006" lon="4.407435">
+                <ele>105.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783924" lon="4.407471">
+                <ele>106.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783837" lon="4.407486">
+                <ele>107.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783771" lon="4.407472">
+                <ele>108.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783697" lon="4.407428">
+                <ele>109.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783626" lon="4.407363">
+                <ele>110.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783548" lon="4.407274">
+                <ele>110.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783458" lon="4.407134">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783123" lon="4.406435">
+                <ele>111.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782982" lon="4.406168">
+                <ele>112.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782871" lon="4.406044">
+                <ele>113.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78279" lon="4.406021">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782714" lon="4.406018">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782607" lon="4.406047">
+                <ele>113.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782405" lon="4.406194">
+                <ele>114.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782175" lon="4.406413">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781749" lon="4.407018">
+                <ele>118.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781654" lon="4.407316">
+                <ele>119.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781563" lon="4.407764">
+                <ele>121.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781487" lon="4.407984">
+                <ele>122.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781422" lon="4.408216">
+                <ele>122.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781395" lon="4.408508">
+                <ele>123.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781399" lon="4.409114">
+                <ele>126.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781367" lon="4.409428">
+                <ele>128.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781286" lon="4.409607">
+                <ele>129.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78116" lon="4.409789">
+                <ele>130.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780804" lon="4.409993">
+                <ele>130.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780389" lon="4.410334">
+                <ele>131.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780232" lon="4.410563">
+                <ele>132.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780094" lon="4.410827">
+                <ele>132.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779723" lon="4.411582">
+                <ele>135.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779591" lon="4.411791">
+                <ele>135.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779125" lon="4.412435">
+                <ele>132.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.778676" lon="4.412979">
+                <ele>134.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.778194" lon="4.413466">
+                <ele>136.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777427" lon="4.414302">
+                <ele>137.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777165" lon="4.414736">
+                <ele>137.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776927" lon="4.415201">
+                <ele>137.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776778" lon="4.415613">
+                <ele>137.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776553" lon="4.416425">
+                <ele>134.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776326" lon="4.417304">
+                <ele>132.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>150</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776129" lon="4.418383">
+                <ele>129.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:hr>160</gpxtpx:hr>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+        </trkseg>
+    </trk>
+</gpx>
@@ -0,0 +1,500 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1" creator="https://gpx.studio">
+    <metadata>
+        <name>with_power</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
+        </author>
+    </metadata>
+    <trk>
+        <name>with_power</name>
+        <type>Cycling</type>
+        <trkseg>
+            <trkpt lat="50.790867" lon="4.404968">
+                <ele>109.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790714" lon="4.405036">
+                <ele>110.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790336" lon="4.405259">
+                <ele>110.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790165" lon="4.405331">
+                <ele>110.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790008" lon="4.405359">
+                <ele>110.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789818" lon="4.405359">
+                <ele>109.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789409" lon="4.40534">
+                <ele>107.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789105" lon="4.405411">
+                <ele>106.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.788799" lon="4.405527">
+                <ele>108.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.788645" lon="4.405606">
+                <ele>109.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.7885" lon="4.405711">
+                <ele>110.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78822" lon="4.405959">
+                <ele>112.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787956" lon="4.406092">
+                <ele>112.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787814" lon="4.406143">
+                <ele>113.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787674" lon="4.406177">
+                <ele>114.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787451" lon="4.406199">
+                <ele>115.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787297" lon="4.406177">
+                <ele>114.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78716" lon="4.406098">
+                <ele>114.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787045" lon="4.405984">
+                <ele>114.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786683" lon="4.405653">
+                <ele>114.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786538" lon="4.405543">
+                <ele>115.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78635" lon="4.405441">
+                <ele>115.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786275" lon="4.40542">
+                <ele>115.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786182" lon="4.405435">
+                <ele>116.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786121" lon="4.405475">
+                <ele>115.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786042" lon="4.405558">
+                <ele>115.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785821" lon="4.405925">
+                <ele>114.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785672" lon="4.406119">
+                <ele>112.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785516" lon="4.406256">
+                <ele>110.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785384" lon="4.406364">
+                <ele>109.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785126" lon="4.406475">
+                <ele>106.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784697" lon="4.406537">
+                <ele>104.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784591" lon="4.40657">
+                <ele>104.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784507" lon="4.406612">
+                <ele>103.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784435" lon="4.40669">
+                <ele>103.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784209" lon="4.407148">
+                <ele>103.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784162" lon="4.407257">
+                <ele>103.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784077" lon="4.407372">
+                <ele>104.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784006" lon="4.407435">
+                <ele>105.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783924" lon="4.407471">
+                <ele>106.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783837" lon="4.407486">
+                <ele>107.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783771" lon="4.407472">
+                <ele>108.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783697" lon="4.407428">
+                <ele>109.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783626" lon="4.407363">
+                <ele>110.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783548" lon="4.407274">
+                <ele>110.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783458" lon="4.407134">
+                <ele>110.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783123" lon="4.406435">
+                <ele>111.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782982" lon="4.406168">
+                <ele>112.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782871" lon="4.406044">
+                <ele>113.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78279" lon="4.406021">
+                <ele>113.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782714" lon="4.406018">
+                <ele>113.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782607" lon="4.406047">
+                <ele>113.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782405" lon="4.406194">
+                <ele>114.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782175" lon="4.406413">
+                <ele>115.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781749" lon="4.407018">
+                <ele>118.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781654" lon="4.407316">
+                <ele>119.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781563" lon="4.407764">
+                <ele>121.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781487" lon="4.407984">
+                <ele>122.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781422" lon="4.408216">
+                <ele>122.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781395" lon="4.408508">
+                <ele>123.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781399" lon="4.409114">
+                <ele>126.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781367" lon="4.409428">
+                <ele>128.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781286" lon="4.409607">
+                <ele>129.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78116" lon="4.409789">
+                <ele>130.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780804" lon="4.409993">
+                <ele>130.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780389" lon="4.410334">
+                <ele>131.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780232" lon="4.410563">
+                <ele>132.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780094" lon="4.410827">
+                <ele>132.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779723" lon="4.411582">
+                <ele>135.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779591" lon="4.411791">
+                <ele>135.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779125" lon="4.412435">
+                <ele>132.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.778676" lon="4.412979">
+                <ele>134.0</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.778194" lon="4.413466">
+                <ele>136.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777427" lon="4.414302">
+                <ele>137.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777165" lon="4.414736">
+                <ele>137.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776927" lon="4.415201">
+                <ele>137.5</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776778" lon="4.415613">
+                <ele>137.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776553" lon="4.416425">
+                <ele>134.8</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776326" lon="4.417304">
+                <ele>132.3</ele>
+                <extensions>
+                    <power>200</power>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776129" lon="4.418383">
+                <ele>129.5</ele>
+                <extensions>
+                    <power>210</power>
+                </extensions>
+            </trkpt>
+        </trkseg>
+    </trk>
+</gpx>
@@ -0,0 +1,665 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1"
+    xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd
+                        http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd
+                        http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd
+                        http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxpx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1"
+    creator="https://gpx.studio">
+    <metadata>
+        <name>with_power</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
+        </author>
+    </metadata>
+    <trk>
+        <name>with_power</name>
+        <type>Cycling</type>
+        <trkseg>
+            <trkpt lat="50.790867" lon="4.404968">
+                <ele>109.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790714" lon="4.405036">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790336" lon="4.405259">
+                <ele>110.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790165" lon="4.405331">
+                <ele>110.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790008" lon="4.405359">
+                <ele>110.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789818" lon="4.405359">
+                <ele>109.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789409" lon="4.40534">
+                <ele>107.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789105" lon="4.405411">
+                <ele>106.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.788799" lon="4.405527">
+                <ele>108.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.788645" lon="4.405606">
+                <ele>109.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.7885" lon="4.405711">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78822" lon="4.405959">
+                <ele>112.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787956" lon="4.406092">
+                <ele>112.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787814" lon="4.406143">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787674" lon="4.406177">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787451" lon="4.406199">
+                <ele>115.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787297" lon="4.406177">
+                <ele>114.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78716" lon="4.406098">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787045" lon="4.405984">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786683" lon="4.405653">
+                <ele>114.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786538" lon="4.405543">
+                <ele>115.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78635" lon="4.405441">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786275" lon="4.40542">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786182" lon="4.405435">
+                <ele>116.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786121" lon="4.405475">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786042" lon="4.405558">
+                <ele>115.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785821" lon="4.405925">
+                <ele>114.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785672" lon="4.406119">
+                <ele>112.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785516" lon="4.406256">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785384" lon="4.406364">
+                <ele>109.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785126" lon="4.406475">
+                <ele>106.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784697" lon="4.406537">
+                <ele>104.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784591" lon="4.40657">
+                <ele>104.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784507" lon="4.406612">
+                <ele>103.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784435" lon="4.40669">
+                <ele>103.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784209" lon="4.407148">
+                <ele>103.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784162" lon="4.407257">
+                <ele>103.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784077" lon="4.407372">
+                <ele>104.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784006" lon="4.407435">
+                <ele>105.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783924" lon="4.407471">
+                <ele>106.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783837" lon="4.407486">
+                <ele>107.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783771" lon="4.407472">
+                <ele>108.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783697" lon="4.407428">
+                <ele>109.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783626" lon="4.407363">
+                <ele>110.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783548" lon="4.407274">
+                <ele>110.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783458" lon="4.407134">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783123" lon="4.406435">
+                <ele>111.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782982" lon="4.406168">
+                <ele>112.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782871" lon="4.406044">
+                <ele>113.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78279" lon="4.406021">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782714" lon="4.406018">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782607" lon="4.406047">
+                <ele>113.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782405" lon="4.406194">
+                <ele>114.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782175" lon="4.406413">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781749" lon="4.407018">
+                <ele>118.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781654" lon="4.407316">
+                <ele>119.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781563" lon="4.407764">
+                <ele>121.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781487" lon="4.407984">
+                <ele>122.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781422" lon="4.408216">
+                <ele>122.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781395" lon="4.408508">
+                <ele>123.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781399" lon="4.409114">
+                <ele>126.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781367" lon="4.409428">
+                <ele>128.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781286" lon="4.409607">
+                <ele>129.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78116" lon="4.409789">
+                <ele>130.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780804" lon="4.409993">
+                <ele>130.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780389" lon="4.410334">
+                <ele>131.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780232" lon="4.410563">
+                <ele>132.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780094" lon="4.410827">
+                <ele>132.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779723" lon="4.411582">
+                <ele>135.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779591" lon="4.411791">
+                <ele>135.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779125" lon="4.412435">
+                <ele>132.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.778676" lon="4.412979">
+                <ele>134.0</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.778194" lon="4.413466">
+                <ele>136.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777427" lon="4.414302">
+                <ele>137.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777165" lon="4.414736">
+                <ele>137.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776927" lon="4.415201">
+                <ele>137.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776778" lon="4.415613">
+                <ele>137.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776553" lon="4.416425">
+                <ele>134.8</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776326" lon="4.417304">
+                <ele>132.3</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>200</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776129" lon="4.418383">
+                <ele>129.5</ele>
+                <extensions>
+                    <gpxpx:PowerExtension>
+                        <gpxpx:PowerInWatts>210</gpxpx:PowerInWatts>
+                    </gpxpx:PowerExtension>
+                </extensions>
+            </trkpt>
+        </trkseg>
+    </trk>
+</gpx>
@@ -0,0 +1,253 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1" creator="https://gpx.studio">
+    <metadata>
+        <name>with_routes</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
+        </author>
+    </metadata>
+    <rte>
+        <name>route 1</name>
+        <type>Cycling</type>
+        <rtept lat="50.790867" lon="4.404968">
+            <ele>109.0</ele>
+        </rtept>
+        <rtept lat="50.790714" lon="4.405036">
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+        </rtept>
+        <rtept lat="50.790336" lon="4.405259">
+            <ele>110.3</ele>
+        </rtept>
+        <rtept lat="50.790165" lon="4.405331">
+            <ele>110.0</ele>
+        </rtept>
+        <rtept lat="50.790008" lon="4.405359">
+            <ele>110.3</ele>
+        </rtept>
+        <rtept lat="50.789818" lon="4.405359">
+            <ele>109.3</ele>
+        </rtept>
+        <rtept lat="50.789409" lon="4.40534">
+            <ele>107.0</ele>
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+        <rtept lat="50.789105" lon="4.405411">
+            <ele>106.0</ele>
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+        <rtept lat="50.788799" lon="4.405527">
+            <ele>108.5</ele>
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+        <rtept lat="50.788645" lon="4.405606">
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+        <rtept lat="50.7885" lon="4.405711">
+            <ele>110.8</ele>
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+        <rtept lat="50.78822" lon="4.405959">
+            <ele>112.0</ele>
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+            <ele>113.3</ele>
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+    <rte>
+        <name>route 2</name>
+        <type>Cycling</type>
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+            <ele>123.5</ele>
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+            <ele>126.3</ele>
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+        <rtept lat="50.781286" lon="4.409607">
+            <ele>129.0</ele>
+        </rtept>
+        <rtept lat="50.78116" lon="4.409789">
+            <ele>130.0</ele>
+        </rtept>
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+            <ele>130.8</ele>
+        </rtept>
+        <rtept lat="50.780389" lon="4.410334">
+            <ele>131.8</ele>
+        </rtept>
+        <rtept lat="50.780232" lon="4.410563">
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+            <ele>137.5</ele>
+        </rtept>
+        <rtept lat="50.777165" lon="4.414736">
+            <ele>137.3</ele>
+        </rtept>
+        <rtept lat="50.776927" lon="4.415201">
+            <ele>137.5</ele>
+        </rtept>
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+            <ele>137.3</ele>
+        </rtept>
+        <rtept lat="50.776553" lon="4.416425">
+            <ele>134.8</ele>
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+            <ele>132.3</ele>
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+        <rtept lat="50.776129" lon="4.418383">
+            <ele>129.5</ele>
+        </rtept>
+    </rte>
+</gpx>
@@ -0,0 +1,253 @@
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+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1" creator="https://gpx.studio">
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+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
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@@ -0,0 +1,267 @@
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+    xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
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+        <author>
+            <name>gpx.studio</name>
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+            <trkpt lat="50.776129" lon="4.418383">
+                <ele>129.5</ele>
+            </trkpt>
+        </trkseg>
+    </trk>
+</gpx>
@@ -0,0 +1,820 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1" creator="https://gpx.studio">
+    <metadata>
+        <name>with_surface</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
+        </author>
+    </metadata>
+    <trk>
+        <name>with_surface</name>
+        <type>Cycling</type>
+        <trkseg>
+            <trkpt lat="50.790867" lon="4.404968">
+                <ele>109.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790714" lon="4.405036">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790336" lon="4.405259">
+                <ele>110.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790165" lon="4.405331">
+                <ele>110.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790008" lon="4.405359">
+                <ele>110.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789818" lon="4.405359">
+                <ele>109.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789409" lon="4.40534">
+                <ele>107.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789105" lon="4.405411">
+                <ele>106.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.788799" lon="4.405527">
+                <ele>108.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.788645" lon="4.405606">
+                <ele>109.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.7885" lon="4.405711">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78822" lon="4.405959">
+                <ele>112.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787956" lon="4.406092">
+                <ele>112.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787814" lon="4.406143">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787674" lon="4.406177">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787451" lon="4.406199">
+                <ele>115.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787297" lon="4.406177">
+                <ele>114.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78716" lon="4.406098">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787045" lon="4.405984">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786683" lon="4.405653">
+                <ele>114.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786538" lon="4.405543">
+                <ele>115.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78635" lon="4.405441">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786275" lon="4.40542">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786182" lon="4.405435">
+                <ele>116.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786121" lon="4.405475">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786042" lon="4.405558">
+                <ele>115.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785821" lon="4.405925">
+                <ele>114.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785672" lon="4.406119">
+                <ele>112.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785516" lon="4.406256">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785384" lon="4.406364">
+                <ele>109.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785126" lon="4.406475">
+                <ele>106.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784697" lon="4.406537">
+                <ele>104.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784591" lon="4.40657">
+                <ele>104.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784507" lon="4.406612">
+                <ele>103.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784435" lon="4.40669">
+                <ele>103.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784209" lon="4.407148">
+                <ele>103.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784162" lon="4.407257">
+                <ele>103.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784077" lon="4.407372">
+                <ele>104.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784006" lon="4.407435">
+                <ele>105.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783924" lon="4.407471">
+                <ele>106.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783837" lon="4.407486">
+                <ele>107.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783771" lon="4.407472">
+                <ele>108.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783697" lon="4.407428">
+                <ele>109.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783626" lon="4.407363">
+                <ele>110.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783548" lon="4.407274">
+                <ele>110.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783458" lon="4.407134">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783123" lon="4.406435">
+                <ele>111.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782982" lon="4.406168">
+                <ele>112.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782871" lon="4.406044">
+                <ele>113.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78279" lon="4.406021">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782714" lon="4.406018">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782607" lon="4.406047">
+                <ele>113.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782405" lon="4.406194">
+                <ele>114.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782175" lon="4.406413">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781749" lon="4.407018">
+                <ele>118.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781654" lon="4.407316">
+                <ele>119.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781563" lon="4.407764">
+                <ele>121.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781487" lon="4.407984">
+                <ele>122.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781422" lon="4.408216">
+                <ele>122.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781395" lon="4.408508">
+                <ele>123.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781399" lon="4.409114">
+                <ele>126.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781367" lon="4.409428">
+                <ele>128.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.781286" lon="4.409607">
+                <ele>129.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78116" lon="4.409789">
+                <ele>130.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780804" lon="4.409993">
+                <ele>130.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780389" lon="4.410334">
+                <ele>131.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780232" lon="4.410563">
+                <ele>132.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.780094" lon="4.410827">
+                <ele>132.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779723" lon="4.411582">
+                <ele>135.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779591" lon="4.411791">
+                <ele>135.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.779125" lon="4.412435">
+                <ele>132.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.778676" lon="4.412979">
+                <ele>134.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.778194" lon="4.413466">
+                <ele>136.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777427" lon="4.414302">
+                <ele>137.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777165" lon="4.414736">
+                <ele>137.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776927" lon="4.415201">
+                <ele>137.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776778" lon="4.415613">
+                <ele>137.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776553" lon="4.416425">
+                <ele>134.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776326" lon="4.417304">
+                <ele>132.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>asphalt</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776129" lon="4.418383">
+                <ele>129.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:Extensions>
+                            <surface>cobblestone</surface>
+                        </gpxtpx:Extensions>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+        </trkseg>
+    </trk>
+</gpx>
@@ -0,0 +1,660 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1" creator="https://gpx.studio">
+    <metadata>
+        <name>with_temp</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
+        </author>
+    </metadata>
+    <trk>
+        <name>with_temp</name>
+        <type>Cycling</type>
+        <trkseg>
+            <trkpt lat="50.790867" lon="4.404968">
+                <ele>109.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790714" lon="4.405036">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790336" lon="4.405259">
+                <ele>110.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790165" lon="4.405331">
+                <ele>110.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.790008" lon="4.405359">
+                <ele>110.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789818" lon="4.405359">
+                <ele>109.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789409" lon="4.40534">
+                <ele>107.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.789105" lon="4.405411">
+                <ele>106.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.788799" lon="4.405527">
+                <ele>108.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.788645" lon="4.405606">
+                <ele>109.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.7885" lon="4.405711">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78822" lon="4.405959">
+                <ele>112.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787956" lon="4.406092">
+                <ele>112.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787814" lon="4.406143">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787674" lon="4.406177">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787451" lon="4.406199">
+                <ele>115.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787297" lon="4.406177">
+                <ele>114.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78716" lon="4.406098">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.787045" lon="4.405984">
+                <ele>114.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786683" lon="4.405653">
+                <ele>114.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786538" lon="4.405543">
+                <ele>115.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78635" lon="4.405441">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786275" lon="4.40542">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786182" lon="4.405435">
+                <ele>116.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786121" lon="4.405475">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.786042" lon="4.405558">
+                <ele>115.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785821" lon="4.405925">
+                <ele>114.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785672" lon="4.406119">
+                <ele>112.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785516" lon="4.406256">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785384" lon="4.406364">
+                <ele>109.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.785126" lon="4.406475">
+                <ele>106.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784697" lon="4.406537">
+                <ele>104.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784591" lon="4.40657">
+                <ele>104.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784507" lon="4.406612">
+                <ele>103.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784435" lon="4.40669">
+                <ele>103.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784209" lon="4.407148">
+                <ele>103.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784162" lon="4.407257">
+                <ele>103.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784077" lon="4.407372">
+                <ele>104.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.784006" lon="4.407435">
+                <ele>105.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783924" lon="4.407471">
+                <ele>106.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783837" lon="4.407486">
+                <ele>107.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783771" lon="4.407472">
+                <ele>108.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783697" lon="4.407428">
+                <ele>109.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783626" lon="4.407363">
+                <ele>110.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783548" lon="4.407274">
+                <ele>110.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783458" lon="4.407134">
+                <ele>110.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.783123" lon="4.406435">
+                <ele>111.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782982" lon="4.406168">
+                <ele>112.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782871" lon="4.406044">
+                <ele>113.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.78279" lon="4.406021">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782714" lon="4.406018">
+                <ele>113.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782607" lon="4.406047">
+                <ele>113.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782405" lon="4.406194">
+                <ele>114.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.782175" lon="4.406413">
+                <ele>115.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
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+                    </gpxtpx:TrackPointExtension>
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+                    <gpxtpx:TrackPointExtension>
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+                    <gpxtpx:TrackPointExtension>
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+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
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+                    <gpxtpx:TrackPointExtension>
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+                    </gpxtpx:TrackPointExtension>
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+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
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+                    <gpxtpx:TrackPointExtension>
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+                    <gpxtpx:TrackPointExtension>
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+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
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+                <ele>129.0</ele>
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+                    <gpxtpx:TrackPointExtension>
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+                    </gpxtpx:TrackPointExtension>
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+                <ele>130.0</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
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+                    </gpxtpx:TrackPointExtension>
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+                <extensions>
+                    <gpxtpx:TrackPointExtension>
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+                    <gpxtpx:TrackPointExtension>
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+                    <gpxtpx:TrackPointExtension>
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+                    <gpxtpx:TrackPointExtension>
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+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
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+                <extensions>
+                    <gpxtpx:TrackPointExtension>
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+                    </gpxtpx:TrackPointExtension>
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+                <extensions>
+                    <gpxtpx:TrackPointExtension>
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+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.777165" lon="4.414736">
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+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
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+            </trkpt>
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+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
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+                <ele>137.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
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+            </trkpt>
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+                <ele>134.8</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776326" lon="4.417304">
+                <ele>132.3</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>21</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+            <trkpt lat="50.776129" lon="4.418383">
+                <ele>129.5</ele>
+                <extensions>
+                    <gpxtpx:TrackPointExtension>
+                        <gpxtpx:atemp>22</gpxtpx:atemp>
+                    </gpxtpx:TrackPointExtension>
+                </extensions>
+            </trkpt>
+        </trkseg>
+    </trk>
+</gpx>
@@ -0,0 +1,340 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1" creator="https://gpx.studio">
+    <metadata>
+        <name>with_time</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
+        </author>
+    </metadata>
+    <trk>
+        <name>with_time</name>
+        <type>Cycling</type>
+        <trkseg>
+            <trkpt lat="50.790867" lon="4.404968">
+                <ele>109.0</ele>
+                <time>2023-12-31T23:00:00.000Z</time>
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+            <trkpt lat="50.790714" lon="4.405036">
+                <ele>110.8</ele>
+                <time>2023-12-31T23:00:03.180Z</time>
+            </trkpt>
+            <trkpt lat="50.790336" lon="4.405259">
+                <ele>110.3</ele>
+                <time>2023-12-31T23:00:11.254Z</time>
+            </trkpt>
+            <trkpt lat="50.790165" lon="4.405331">
+                <ele>110.0</ele>
+                <time>2023-12-31T23:00:14.795Z</time>
+            </trkpt>
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+                <time>2023-12-31T23:00:17.957Z</time>
+            </trkpt>
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+                <time>2023-12-31T23:00:21.759Z</time>
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+                <time>2023-12-31T23:00:29.948Z</time>
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+                <ele>106.0</ele>
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+                <time>2023-12-31T23:01:00.794Z</time>
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+            </trkpt>
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+                <time>2023-12-31T23:01:06.542Z</time>
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+            </trkpt>
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+                <time>2023-12-31T23:01:17.026Z</time>
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+                <time>2023-12-31T23:01:35.306Z</time>
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+                <time>2023-12-31T23:01:36.830Z</time>
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+                <time>2023-12-31T23:02:12.713Z</time>
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+                <ele>103.8</ele>
+                <time>2023-12-31T23:02:16.638Z</time>
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+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1" creator="https://gpx.studio">
+    <metadata>
+        <name>with_tracks</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
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+        </trkseg>
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+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1" creator="https://gpx.studio">
+    <metadata>
+        <name>with_tracks_and_segments</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
+        </author>
+    </metadata>
+    <trk>
+        <name>track 1</name>
+        <type>Running</type>
+        <trkseg>
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+                <time>2023-12-31T23:02:32.625Z</time>
+            </trkpt>
+            <trkpt lat="50.783924" lon="4.407471">
+                <ele>106.8</ele>
+                <time>2023-12-31T23:02:34.328Z</time>
+            </trkpt>
+            <trkpt lat="50.783837" lon="4.407486">
+                <ele>107.8</ele>
+                <time>2023-12-31T23:02:36.079Z</time>
+            </trkpt>
+            <trkpt lat="50.783771" lon="4.407472">
+                <ele>108.5</ele>
+                <time>2023-12-31T23:02:37.411Z</time>
+            </trkpt>
+            <trkpt lat="50.783697" lon="4.407428">
+                <ele>109.3</ele>
+                <time>2023-12-31T23:02:38.993Z</time>
+            </trkpt>
+            <trkpt lat="50.783626" lon="4.407363">
+                <ele>110.0</ele>
+                <time>2023-12-31T23:02:40.634Z</time>
+            </trkpt>
+            <trkpt lat="50.783548" lon="4.407274">
+                <ele>110.5</ele>
+                <time>2023-12-31T23:02:42.559Z</time>
+            </trkpt>
+            <trkpt lat="50.783458" lon="4.407134">
+                <ele>110.8</ele>
+                <time>2023-12-31T23:02:45.085Z</time>
+            </trkpt>
+            <trkpt lat="50.783123" lon="4.406435">
+                <ele>111.8</ele>
+                <time>2023-12-31T23:02:56.184Z</time>
+            </trkpt>
+            <trkpt lat="50.782982" lon="4.406168">
+                <ele>112.8</ele>
+                <time>2023-12-31T23:03:00.586Z</time>
+            </trkpt>
+            <trkpt lat="50.782871" lon="4.406044">
+                <ele>113.3</ele>
+                <time>2023-12-31T23:03:03.305Z</time>
+            </trkpt>
+        </trkseg>
+    </trk>
+    <trk>
+        <name>track 2</name>
+        <type>Running</type>
+        <trkseg>
+            <trkpt lat="50.782212" lon="4.406377">
+                <ele>115.5</ele>
+                <time>2023-12-31T23:03:17.151Z</time>
+            </trkpt>
+            <trkpt lat="50.782175" lon="4.406413">
+                <ele>115.8</ele>
+                <time>2023-12-31T23:03:18.020Z</time>
+            </trkpt>
+            <trkpt lat="50.781749" lon="4.407018">
+                <ele>118.5</ele>
+                <time>2023-12-31T23:03:29.479Z</time>
+            </trkpt>
+            <trkpt lat="50.781654" lon="4.407316">
+                <ele>119.5</ele>
+                <time>2023-12-31T23:03:33.702Z</time>
+            </trkpt>
+            <trkpt lat="50.781563" lon="4.407764">
+                <ele>121.3</ele>
+                <time>2023-12-31T23:03:39.656Z</time>
+            </trkpt>
+            <trkpt lat="50.781487" lon="4.407984">
+                <ele>122.0</ele>
+                <time>2023-12-31T23:03:42.828Z</time>
+            </trkpt>
+            <trkpt lat="50.781422" lon="4.408216">
+                <ele>122.8</ele>
+                <time>2023-12-31T23:03:46.039Z</time>
+            </trkpt>
+            <trkpt lat="50.781395" lon="4.408508">
+                <ele>123.5</ele>
+                <time>2023-12-31T23:03:49.773Z</time>
+            </trkpt>
+            <trkpt lat="50.781399" lon="4.409114">
+                <ele>126.3</ele>
+                <time>2023-12-31T23:03:57.442Z</time>
+            </trkpt>
+            <trkpt lat="50.781367" lon="4.409428">
+                <ele>128.0</ele>
+                <time>2023-12-31T23:04:01.467Z</time>
+            </trkpt>
+            <trkpt lat="50.781286" lon="4.409607">
+                <ele>129.0</ele>
+                <time>2023-12-31T23:04:04.252Z</time>
+            </trkpt>
+            <trkpt lat="50.78116" lon="4.409789">
+                <ele>130.0</ele>
+                <time>2023-12-31T23:04:07.667Z</time>
+            </trkpt>
+            <trkpt lat="50.780804" lon="4.409993">
+                <ele>130.8</ele>
+                <time>2023-12-31T23:04:15.245Z</time>
+            </trkpt>
+            <trkpt lat="50.780389" lon="4.410334">
+                <ele>131.8</ele>
+                <time>2023-12-31T23:04:24.605Z</time>
+            </trkpt>
+            <trkpt lat="50.780232" lon="4.410563">
+                <ele>132.3</ele>
+                <time>2023-12-31T23:04:28.879Z</time>
+            </trkpt>
+            <trkpt lat="50.780094" lon="4.410827">
+                <ele>132.8</ele>
+                <time>2023-12-31T23:04:33.213Z</time>
+            </trkpt>
+            <trkpt lat="50.779723" lon="4.411582">
+                <ele>135.8</ele>
+                <time>2023-12-31T23:04:45.314Z</time>
+            </trkpt>
+            <trkpt lat="50.779591" lon="4.411791">
+                <ele>135.5</ele>
+                <time>2023-12-31T23:04:49.052Z</time>
+            </trkpt>
+            <trkpt lat="50.779125" lon="4.412435">
+                <ele>132.5</ele>
+                <time>2023-12-31T23:05:01.438Z</time>
+            </trkpt>
+        </trkseg>
+        <trkseg>
+            <trkpt lat="50.77906316558724" lon="4.412547477922485">
+                <ele>133.3</ele>
+                <time>2023-12-31T23:05:03.324Z</time>
+            </trkpt>
+            <trkpt lat="50.778676" lon="4.412979">
+                <ele>134.0</ele>
+                <time>2023-12-31T23:05:12.804Z</time>
+            </trkpt>
+            <trkpt lat="50.778194" lon="4.413466">
+                <ele>136.8</ele>
+                <time>2023-12-31T23:05:24.252Z</time>
+            </trkpt>
+            <trkpt lat="50.777427" lon="4.414302">
+                <ele>137.5</ele>
+                <time>2023-12-31T23:05:42.896Z</time>
+            </trkpt>
+            <trkpt lat="50.777165" lon="4.414736">
+                <ele>137.3</ele>
+                <time>2023-12-31T23:05:50.490Z</time>
+            </trkpt>
+            <trkpt lat="50.776927" lon="4.415201">
+                <ele>137.5</ele>
+                <time>2023-12-31T23:05:58.061Z</time>
+            </trkpt>
+            <trkpt lat="50.776778" lon="4.415613">
+                <ele>137.3</ele>
+                <time>2023-12-31T23:06:04.068Z</time>
+            </trkpt>
+            <trkpt lat="50.776553" lon="4.416425">
+                <ele>134.8</ele>
+                <time>2023-12-31T23:06:15.288Z</time>
+            </trkpt>
+            <trkpt lat="50.776326" lon="4.417304">
+                <ele>132.3</ele>
+                <time>2023-12-31T23:06:27.305Z</time>
+            </trkpt>
+            <trkpt lat="50.776129" lon="4.418383">
+                <ele>129.5</ele>
+                <time>2023-12-31T23:06:41.519Z</time>
+            </trkpt>
+        </trkseg>
+    </trk>
+</gpx>
@@ -0,0 +1,276 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://www.topografix.com/GPX/1/1"
+    xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd
+                        http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd
+                        http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd
+                        http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd"
+    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
+    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
+    xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2" version="1.1"
+    creator="https://gpx.studio">
+    <metadata>
+        <name>with_waypoint</name>
+        <author>
+            <name>gpx.studio</name>
+            <link href="https://gpx.studio"></link>
+        </author>
+    </metadata>
+    <wpt lat="50.7836710064975" lon="4.410764082658738">
+        <ele>122.0</ele>
+        <name>waypoint name</name>
+        <cmt>waypoint comment</cmt>
+        <desc>waypoint description</desc>
+        <link href="https://gpx.studio">
+            <text>waypoint link text</text>
+        </link>
+        <sym>Bike Trail</sym>
+        <type>Bike Trail</type>
+    </wpt>
+    <trk>
+        <name>with_waypoint</name>
+        <type>Cycling</type>
+        <trkseg>
+            <trkpt lat="50.790867" lon="4.404968">
+                <ele>109.0</ele>
+            </trkpt>
+            <trkpt lat="50.790714" lon="4.405036">
+                <ele>110.8</ele>
+            </trkpt>
+            <trkpt lat="50.790336" lon="4.405259">
+                <ele>110.3</ele>
+            </trkpt>
+            <trkpt lat="50.790165" lon="4.405331">
+                <ele>110.0</ele>
+            </trkpt>
+            <trkpt lat="50.790008" lon="4.405359">
+                <ele>110.3</ele>
+            </trkpt>
+            <trkpt lat="50.789818" lon="4.405359">
+                <ele>109.3</ele>
+            </trkpt>
+            <trkpt lat="50.789409" lon="4.40534">
+                <ele>107.0</ele>
+            </trkpt>
+            <trkpt lat="50.789105" lon="4.405411">
+                <ele>106.0</ele>
+            </trkpt>
+            <trkpt lat="50.788799" lon="4.405527">
+                <ele>108.5</ele>
+            </trkpt>
+            <trkpt lat="50.788645" lon="4.405606">
+                <ele>109.8</ele>
+            </trkpt>
+            <trkpt lat="50.7885" lon="4.405711">
+                <ele>110.8</ele>
+            </trkpt>
+            <trkpt lat="50.78822" lon="4.405959">
+                <ele>112.0</ele>
+            </trkpt>
+            <trkpt lat="50.787956" lon="4.406092">
+                <ele>112.8</ele>
+            </trkpt>
+            <trkpt lat="50.787814" lon="4.406143">
+                <ele>113.5</ele>
+            </trkpt>
+            <trkpt lat="50.787674" lon="4.406177">
+                <ele>114.3</ele>
+            </trkpt>
+            <trkpt lat="50.787451" lon="4.406199">
+                <ele>115.3</ele>
+            </trkpt>
+            <trkpt lat="50.787297" lon="4.406177">
+                <ele>114.8</ele>
+            </trkpt>
+            <trkpt lat="50.78716" lon="4.406098">
+                <ele>114.3</ele>
+            </trkpt>
+            <trkpt lat="50.787045" lon="4.405984">
+                <ele>114.3</ele>
+            </trkpt>
+            <trkpt lat="50.786683" lon="4.405653">
+                <ele>114.5</ele>
+            </trkpt>
+            <trkpt lat="50.786538" lon="4.405543">
+                <ele>115.0</ele>
+            </trkpt>
+            <trkpt lat="50.78635" lon="4.405441">
+                <ele>115.8</ele>
+            </trkpt>
+            <trkpt lat="50.786275" lon="4.40542">
+                <ele>115.8</ele>
+            </trkpt>
+            <trkpt lat="50.786182" lon="4.405435">
+                <ele>116.0</ele>
+            </trkpt>
+            <trkpt lat="50.786121" lon="4.405475">
+                <ele>115.8</ele>
+            </trkpt>
+            <trkpt lat="50.786042" lon="4.405558">
+                <ele>115.5</ele>
+            </trkpt>
+            <trkpt lat="50.785821" lon="4.405925">
+                <ele>114.5</ele>
+            </trkpt>
+            <trkpt lat="50.785672" lon="4.406119">
+                <ele>112.5</ele>
+            </trkpt>
+            <trkpt lat="50.785516" lon="4.406256">
+                <ele>110.8</ele>
+            </trkpt>
+            <trkpt lat="50.785384" lon="4.406364">
+                <ele>109.0</ele>
+            </trkpt>
+            <trkpt lat="50.785126" lon="4.406475">
+                <ele>106.3</ele>
+            </trkpt>
+            <trkpt lat="50.784697" lon="4.406537">
+                <ele>104.3</ele>
+            </trkpt>
+            <trkpt lat="50.784591" lon="4.40657">
+                <ele>104.0</ele>
+            </trkpt>
+            <trkpt lat="50.784507" lon="4.406612">
+                <ele>103.8</ele>
+            </trkpt>
+            <trkpt lat="50.784435" lon="4.40669">
+                <ele>103.3</ele>
+            </trkpt>
+            <trkpt lat="50.784209" lon="4.407148">
+                <ele>103.5</ele>
+            </trkpt>
+            <trkpt lat="50.784162" lon="4.407257">
+                <ele>103.8</ele>
+            </trkpt>
+            <trkpt lat="50.784077" lon="4.407372">
+                <ele>104.8</ele>
+            </trkpt>
+            <trkpt lat="50.784006" lon="4.407435">
+                <ele>105.8</ele>
+            </trkpt>
+            <trkpt lat="50.783924" lon="4.407471">
+                <ele>106.8</ele>
+            </trkpt>
+            <trkpt lat="50.783837" lon="4.407486">
+                <ele>107.8</ele>
+            </trkpt>
+            <trkpt lat="50.783771" lon="4.407472">
+                <ele>108.5</ele>
+            </trkpt>
+            <trkpt lat="50.783697" lon="4.407428">
+                <ele>109.3</ele>
+            </trkpt>
+            <trkpt lat="50.783626" lon="4.407363">
+                <ele>110.0</ele>
+            </trkpt>
+            <trkpt lat="50.783548" lon="4.407274">
+                <ele>110.5</ele>
+            </trkpt>
+            <trkpt lat="50.783458" lon="4.407134">
+                <ele>110.8</ele>
+            </trkpt>
+            <trkpt lat="50.783123" lon="4.406435">
+                <ele>111.8</ele>
+            </trkpt>
+            <trkpt lat="50.782982" lon="4.406168">
+                <ele>112.8</ele>
+            </trkpt>
+            <trkpt lat="50.782871" lon="4.406044">
+                <ele>113.3</ele>
+            </trkpt>
+            <trkpt lat="50.78279" lon="4.406021">
+                <ele>113.5</ele>
+            </trkpt>
+            <trkpt lat="50.782714" lon="4.406018">
+                <ele>113.5</ele>
+            </trkpt>
+            <trkpt lat="50.782607" lon="4.406047">
+                <ele>113.8</ele>
+            </trkpt>
+            <trkpt lat="50.782405" lon="4.406194">
+                <ele>114.8</ele>
+            </trkpt>
+            <trkpt lat="50.782175" lon="4.406413">
+                <ele>115.8</ele>
+            </trkpt>
+            <trkpt lat="50.781749" lon="4.407018">
+                <ele>118.5</ele>
+            </trkpt>
+            <trkpt lat="50.781654" lon="4.407316">
+                <ele>119.5</ele>
+            </trkpt>
+            <trkpt lat="50.781563" lon="4.407764">
+                <ele>121.3</ele>
+            </trkpt>
+            <trkpt lat="50.781487" lon="4.407984">
+                <ele>122.0</ele>
+            </trkpt>
+            <trkpt lat="50.781422" lon="4.408216">
+                <ele>122.8</ele>
+            </trkpt>
+            <trkpt lat="50.781395" lon="4.408508">
+                <ele>123.5</ele>
+            </trkpt>
+            <trkpt lat="50.781399" lon="4.409114">
+                <ele>126.3</ele>
+            </trkpt>
+            <trkpt lat="50.781367" lon="4.409428">
+                <ele>128.0</ele>
+            </trkpt>
+            <trkpt lat="50.781286" lon="4.409607">
+                <ele>129.0</ele>
+            </trkpt>
+            <trkpt lat="50.78116" lon="4.409789">
+                <ele>130.0</ele>
+            </trkpt>
+            <trkpt lat="50.780804" lon="4.409993">
+                <ele>130.8</ele>
+            </trkpt>
+            <trkpt lat="50.780389" lon="4.410334">
+                <ele>131.8</ele>
+            </trkpt>
+            <trkpt lat="50.780232" lon="4.410563">
+                <ele>132.3</ele>
+            </trkpt>
+            <trkpt lat="50.780094" lon="4.410827">
+                <ele>132.8</ele>
+            </trkpt>
+            <trkpt lat="50.779723" lon="4.411582">
+                <ele>135.8</ele>
+            </trkpt>
+            <trkpt lat="50.779591" lon="4.411791">
+                <ele>135.5</ele>
+            </trkpt>
+            <trkpt lat="50.779125" lon="4.412435">
+                <ele>132.5</ele>
+            </trkpt>
+            <trkpt lat="50.778676" lon="4.412979">
+                <ele>134.0</ele>
+            </trkpt>
+            <trkpt lat="50.778194" lon="4.413466">
+                <ele>136.8</ele>
+            </trkpt>
+            <trkpt lat="50.777427" lon="4.414302">
+                <ele>137.5</ele>
+            </trkpt>
+            <trkpt lat="50.777165" lon="4.414736">
+                <ele>137.3</ele>
+            </trkpt>
+            <trkpt lat="50.776927" lon="4.415201">
+                <ele>137.5</ele>
+            </trkpt>
+            <trkpt lat="50.776778" lon="4.415613">
+                <ele>137.3</ele>
+            </trkpt>
+            <trkpt lat="50.776553" lon="4.416425">
+                <ele>134.8</ele>
+            </trkpt>
+            <trkpt lat="50.776326" lon="4.417304">
+                <ele>132.3</ele>
+            </trkpt>
+            <trkpt lat="50.776129" lon="4.418383">
+                <ele>129.5</ele>
+            </trkpt>
+        </trkseg>
+    </trk>
+</gpx>
@@ -0,0 +1,5 @@
+use crate::state::StackEntry;
+
+pub trait Action {
+    fn apply(entry: &mut StackEntry) -> Result<(), &'static str>;
+}
@@ -0,0 +1 @@
+use crate::action::Action;
@@ -0,0 +1,5 @@
+mod action;
+mod file;
+
+pub use action::*;
+pub use file::*;
@@ -0,0 +1,5 @@
+mod simplify;
+mod smooth;
+
+pub use simplify::*;
+pub use smooth::*;
@@ -0,0 +1,69 @@
+use crate::{
+    gpx::{TrackSegment, TrackSegmentIndex},
+    utils::crossarc,
+};
+
+pub fn ramer_douglas_peucker<F>(
+    trkseg: &TrackSegment,
+    mapping: &F,
+    epsilon: f64,
+) -> Vec<TrackSegmentIndex>
+where
+    F: Fn(TrackSegmentIndex) -> (f64, f64),
+{
+    match trkseg.len() {
+        0 => vec![],
+        1 => vec![trkseg.first_index().unwrap()],
+        2 => vec![trkseg.last_index().unwrap()],
+        _ => {
+            let first = trkseg.first_index().unwrap();
+            let last = trkseg.last_index().unwrap();
+
+            let mut indices = vec![first];
+            ramer_douglas_peucker_helper(trkseg, first, last, mapping, epsilon, &mut indices);
+            indices.push(last);
+            indices
+        }
+    }
+}
+
+fn ramer_douglas_peucker_helper<F>(
+    trkseg: &TrackSegment,
+    start: TrackSegmentIndex,
+    end: TrackSegmentIndex,
+    mapping: &F,
+    epsilon: f64,
+    indices: &mut Vec<TrackSegmentIndex>,
+) where
+    F: Fn(TrackSegmentIndex) -> (f64, f64),
+{
+    let mut max_idx = None;
+    let mut max_dist = 0.0;
+
+    let start_pt = mapping(start);
+    let end_pt = mapping(end);
+
+    let mut cur = trkseg.next_index(Some(start));
+    while let Some(idx) = cur {
+        if idx == end {
+            break;
+        }
+
+        let pt = mapping(idx);
+        let dist = crossarc(start_pt.0, start_pt.1, end_pt.0, end_pt.1, pt.0, pt.1);
+        if dist > max_dist {
+            max_idx = Some(idx);
+            max_dist = dist;
+        }
+
+        cur = trkseg.next_index(cur);
+    }
+
+    if let Some(idx) = max_idx {
+        if max_dist > epsilon {
+            ramer_douglas_peucker_helper(trkseg, start, idx, mapping, epsilon, indices);
+            indices.push(idx);
+            ramer_douglas_peucker_helper(trkseg, idx, end, mapping, epsilon, indices);
+        }
+    }
+}
@@ -0,0 +1,54 @@
+#[macro_export]
+macro_rules! for_each_window {
+    (
+        $trkseg:expr,
+        $left:expr,
+        $right:expr,
+        $window:expr,
+        |$a:ident, $b:ident| $distance:expr,
+        |$i:ident, $l:ident, $r:ident| $body:block,
+    ) => {{
+        let mut window_start = $left.unwrap_or_default();
+        let mut window_center = $left;
+        let mut window_end = $left.unwrap_or_default();
+        while let Some(idx) = window_center {
+            // advance left if needed
+            while window_start != idx && {
+                let $a = window_start;
+                let $b = idx;
+                $distance
+            } > $window {
+                if let Some(next) = $trkseg.next_index(Some(window_start)) {
+                    if next == idx {
+                        break;
+                    }
+                    window_start = next;
+                } else {
+                    break;
+                }
+            }
+            // advance right if needed
+            window_end = window_end.max(idx);
+            while let Some(next) = $trkseg.next_index(Some(window_end)) {
+                if window_end != idx && {
+                    let $a = idx;
+                    let $b = next;
+                    $distance
+                } > $window {
+                    break;
+                }
+                window_end = next;
+            }
+            // apply body
+            let $i = idx;
+            let $l = window_start;
+            let $r = window_end;
+            $body
+            // go next
+            if window_center == $right {
+                break;
+            }
+            window_center = $trkseg.next_index(window_center);
+        }
+    }};
+}
@@ -0,0 +1,4 @@
+pub struct CoordinatesBuffer {
+    pub lng: Vec<f64>,
+    pub lat: Vec<f64>,
+}
@@ -0,0 +1,5 @@
+mod coordinates;
+mod statistics;
+
+pub use coordinates::*;
+pub use statistics::*;
@@ -0,0 +1,61 @@
+use crate::statistics::{GlobalStatistics, Statistics, sum_options};
+
+#[derive(Debug, Default)]
+pub struct StatisticsBuffer {
+    pub total_distance: Vec<f64>,
+    pub moving_distance: Vec<f64>,
+    pub total_time: Vec<i32>,
+    pub moving_time: Vec<i32>,
+    pub speed: Vec<f64>,
+    pub elevation_gain: Vec<f64>,
+    pub elevation_loss: Vec<f64>,
+    pub slope: Vec<f64>,
+    pub slope_segment_slope: Vec<f64>,
+    pub slope_segment_distance: Vec<f64>,
+}
+
+impl StatisticsBuffer {
+    pub fn update(&mut self, stats: &[&Statistics]) {
+        self.total_distance.clear();
+        self.moving_distance.clear();
+        self.total_time.clear();
+        self.moving_time.clear();
+        self.speed.clear();
+        self.elevation_gain.clear();
+        self.elevation_loss.clear();
+        self.slope.clear();
+        self.slope_segment_slope.clear();
+        self.slope_segment_distance.clear();
+
+        let mut cumul_stats = GlobalStatistics::default();
+        for stats in stats {
+            for trkpt_stats in stats.local.iter() {
+                self.total_distance
+                    .push(cumul_stats.total_distance + trkpt_stats.total_distance);
+                self.moving_distance.push(
+                    sum_options(cumul_stats.moving_distance, trkpt_stats.moving_distance)
+                        .unwrap_or_default(),
+                );
+                self.total_time.push(
+                    sum_options(cumul_stats.total_time(), trkpt_stats.total_time)
+                        .unwrap_or_default(),
+                );
+                self.moving_time.push(
+                    sum_options(cumul_stats.moving_time, trkpt_stats.moving_time)
+                        .unwrap_or_default(),
+                );
+                self.speed.push(trkpt_stats.speed.unwrap_or_default());
+                self.elevation_gain
+                    .push(cumul_stats.elevation_gain + trkpt_stats.elevation_gain);
+                self.elevation_loss
+                    .push(cumul_stats.elevation_loss + trkpt_stats.elevation_loss);
+                self.slope.push(trkpt_stats.slope);
+                self.slope_segment_slope
+                    .push(trkpt_stats.slope_segment.slope);
+                self.slope_segment_distance
+                    .push(trkpt_stats.slope_segment.distance);
+            }
+            cumul_stats.merge(&stats.global);
+        }
+    }
+}
@@ -0,0 +1,152 @@
+// TODO license in every file
+
+use std::rc::Rc;
+
+use js_sys::{Float64Array, Function, Int32Array};
+use uuid::Uuid;
+use wasm_bindgen::prelude::*;
+
+use crate::{
+    buffer::StatisticsBuffer,
+    gpx::{File, FileId},
+    io::parse,
+    selection::Selection,
+    state::{Stack, StackEntry},
+    statistics::StatisticsCache,
+};
+
+extern crate console_error_panic_hook;
+
+#[derive(Debug, Default)]
+#[wasm_bindgen]
+pub struct Engine {
+    stack: Stack,
+    selection: Selection,
+    statistics_cache: StatisticsCache,
+    statistics_buffer: StatisticsBuffer,
+    callback: Option<Function>,
+}
+
+#[wasm_bindgen]
+impl Engine {
+    #[wasm_bindgen(constructor)]
+    pub fn new(callback: Function) -> Self {
+        console_error_panic_hook::set_once();
+        Self {
+            stack: Default::default(),
+            selection: Default::default(),
+            statistics_cache: Default::default(),
+            statistics_buffer: Default::default(),
+            callback: Some(callback),
+        }
+    }
+
+    pub fn total_distance(&self) -> Float64Array {
+        unsafe { Float64Array::view(&self.statistics_buffer.total_distance) }
+    }
+
+    pub fn moving_distance(&self) -> Float64Array {
+        unsafe { Float64Array::view(&self.statistics_buffer.moving_distance) }
+    }
+
+    pub fn total_time(&self) -> Int32Array {
+        unsafe { Int32Array::view(&self.statistics_buffer.total_time) }
+    }
+
+    pub fn moving_time(&self) -> Int32Array {
+        unsafe { Int32Array::view(&self.statistics_buffer.moving_time) }
+    }
+
+    pub fn speed(&self) -> Float64Array {
+        unsafe { Float64Array::view(&self.statistics_buffer.speed) }
+    }
+
+    pub fn elevation_gain(&self) -> Float64Array {
+        unsafe { Float64Array::view(&self.statistics_buffer.elevation_gain) }
+    }
+
+    pub fn elevation_loss(&self) -> Float64Array {
+        unsafe { Float64Array::view(&self.statistics_buffer.elevation_loss) }
+    }
+
+    pub fn slope(&self) -> Float64Array {
+        unsafe { Float64Array::view(&self.statistics_buffer.slope) }
+    }
+
+    pub fn slope_segment_slope(&self) -> Float64Array {
+        unsafe { Float64Array::view(&self.statistics_buffer.slope_segment_slope) }
+    }
+
+    pub fn slope_segment_distance(&self) -> Float64Array {
+        unsafe { Float64Array::view(&self.statistics_buffer.slope_segment_distance) }
+    }
+
+    pub fn create_file(&mut self, name: &str) {
+        self.event_loop(|entry| {
+            let mut file = File::default();
+            file.info.name = name.to_string();
+            entry.insert(file.id, Rc::new(file));
+            true
+        });
+    }
+
+    pub fn load_file(&mut self, data: &[u8]) {
+        self.event_loop(|entry| {
+            if let Ok(file) = parse(data) {
+                entry.insert(file.id, Rc::new(file));
+                true
+            } else {
+                false
+            }
+        });
+    }
+
+    pub fn delete_file(&mut self, id: &[u8]) {
+        self.event_loop(|entry| {
+            if let Ok(id) = Uuid::from_slice(id) {
+                let id = FileId(id);
+                entry.remove(&id).is_some()
+            } else {
+                false
+            }
+        });
+    }
+
+    fn event_loop<F>(&mut self, f: F)
+    where
+        F: FnOnce(&mut StackEntry) -> bool,
+    {
+        if let Some(diff) = self.stack.create_and_push_next(f) {
+            self.selection.select(diff.added[0]);
+            self.statistics_cache.update(self.stack.current());
+            self.statistics_buffer.update(
+                &self
+                    .statistics_cache
+                    .get(self.stack.current(), &self.selection),
+            );
+            if let Some(c) = &self.callback {
+                let _ = c.call0(&JsValue::NULL);
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::{fs::File, io::Read};
+
+    use super::*;
+
+    #[test]
+    fn test_load_file() {
+        let mut engine = Engine::default();
+
+        let mut f = File::open("data/simple.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+
+        engine.load_file(data.as_bytes());
+
+        assert_eq!(engine.statistics_buffer.total_distance.len(), 80);
+    }
+}
@@ -0,0 +1,61 @@
+use uuid::Uuid;
+
+use crate::gpx::{Trackpoint, Waypoint};
+
+static MAX_TRKPT_CHUNK_SIZE: usize = 4096;
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct TrackpointChunkId(Uuid);
+
+impl Default for TrackpointChunkId {
+    fn default() -> Self {
+        Self(Uuid::new_v4())
+    }
+}
+
+#[derive(Debug, Default)]
+pub struct TrackpointChunk {
+    pub id: TrackpointChunkId,
+    pub trkpt: Vec<Trackpoint>,
+}
+
+impl PartialEq for TrackpointChunk {
+    fn eq(&self, other: &Self) -> bool {
+        self.id == other.id
+    }
+}
+
+impl TrackpointChunk {
+    pub fn is_full(&self) -> bool {
+        self.trkpt.len() == MAX_TRKPT_CHUNK_SIZE
+    }
+}
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct WaypointChunkId(Uuid);
+
+impl Default for WaypointChunkId {
+    fn default() -> Self {
+        Self(Uuid::new_v4())
+    }
+}
+
+static MAX_WPT_CHUNK_SIZE: usize = 128;
+
+#[derive(Debug, Default)]
+pub struct WaypointChunk {
+    pub id: WaypointChunkId,
+    pub wpt: Vec<Waypoint>,
+}
+
+impl PartialEq for WaypointChunk {
+    fn eq(&self, other: &Self) -> bool {
+        self.id == other.id
+    }
+}
+
+impl WaypointChunk {
+    pub fn is_full(&self) -> bool {
+        self.wpt.len() == MAX_WPT_CHUNK_SIZE
+    }
+}
@@ -0,0 +1,48 @@
+#[derive(Debug, Default, PartialEq, Eq)]
+pub struct Link {
+    pub href: String,
+    pub text: Option<String>,
+}
+
+#[derive(Debug, Default, Clone, Copy)]
+pub struct LngLat {
+    pub lng: f64,
+    pub lat: f64,
+}
+
+#[derive(Debug)]
+pub struct LngLatBounds {
+    pub sw: LngLat,
+    pub ne: LngLat,
+}
+
+impl Default for LngLatBounds {
+    fn default() -> Self {
+        Self {
+            sw: LngLat {
+                lng: 180.0,
+                lat: 90.0,
+            },
+            ne: LngLat {
+                lng: -180.0,
+                lat: -90.0,
+            },
+        }
+    }
+}
+
+impl LngLatBounds {
+    pub fn extend(&mut self, coordinates: LngLat) {
+        self.sw.lng = self.sw.lng.min(coordinates.lng);
+        self.sw.lat = self.sw.lat.min(coordinates.lat);
+        self.ne.lng = self.ne.lng.min(coordinates.lng);
+        self.ne.lat = self.ne.lat.min(coordinates.lat);
+    }
+
+    pub fn merge(&mut self, other: &LngLatBounds) {
+        self.sw.lng = self.sw.lng.min(other.sw.lng);
+        self.sw.lat = self.sw.lat.min(other.sw.lat);
+        self.ne.lng = self.ne.lng.min(other.ne.lng);
+        self.ne.lat = self.ne.lat.min(other.ne.lat);
+    }
+}
@@ -0,0 +1,39 @@
+use std::rc::Rc;
+
+use uuid::Uuid;
+
+use crate::gpx::{Link, Track, WaypointChunk};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct FileId(pub Uuid);
+
+impl Default for FileId {
+    fn default() -> Self {
+        Self(Uuid::new_v4())
+    }
+}
+
+#[derive(Debug, Default, PartialEq)]
+pub struct File {
+    pub id: FileId,
+    pub info: FileInfo,
+    pub trk: Vec<Track>,
+    pub wpt: Vec<Rc<WaypointChunk>>,
+    // TODO routes
+}
+
+#[derive(Debug, Default, PartialEq)]
+pub struct FileInfo {
+    pub name: String,
+    pub desc: Option<String>,
+    pub author: Option<Author>,
+    pub link: Option<Link>,
+    pub time: Option<i64>,
+}
+
+#[derive(Debug, Default, PartialEq)]
+pub struct Author {
+    pub name: Option<String>,
+    pub email: Option<String>,
+    pub link: Option<Link>,
+}
@@ -0,0 +1,15 @@
+mod chunk;
+mod common;
+mod file;
+mod segment;
+mod track;
+mod trackpoint;
+mod waypoint;
+
+pub use chunk::*;
+pub use common::*;
+pub use file::*;
+pub use segment::*;
+pub use track::*;
+pub use trackpoint::*;
+pub use waypoint::*;
@@ -0,0 +1,273 @@
+use std::{ops::Index, rc::Rc};
+
+use uuid::Uuid;
+
+use crate::gpx::{Trackpoint, TrackpointChunk};
+
+#[derive(Debug, PartialEq, Eq, Hash)]
+pub struct TrackSegmentId(Uuid);
+
+impl Default for TrackSegmentId {
+    fn default() -> Self {
+        Self(Uuid::new_v4())
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct TrackSegmentRevisionId(Uuid);
+
+impl Default for TrackSegmentRevisionId {
+    fn default() -> Self {
+        Self(Uuid::new_v4())
+    }
+}
+
+#[derive(Debug, Default, PartialEq)]
+pub struct TrackSegment {
+    pub id: TrackSegmentId,
+    pub rev_id: TrackSegmentRevisionId,
+    chunks: Vec<Rc<TrackpointChunk>>,
+    cumul_length: Vec<usize>,
+}
+
+impl TrackSegment {
+    pub fn push(&mut self, chunk: TrackpointChunk) {
+        if chunk.trkpt.is_empty() {
+            return;
+        }
+        self.cumul_length
+            .push(self.cumul_length.last().copied().unwrap_or_default() + chunk.trkpt.len());
+        self.chunks.push(Rc::new(chunk));
+    }
+
+    pub fn len(&self) -> usize {
+        self.cumul_length.last().copied().unwrap_or_default()
+    }
+
+    pub fn iter(&self) -> TrackSegmentIterator<'_> {
+        TrackSegmentIterator::new(self)
+    }
+
+    pub fn first_index(&self) -> Option<TrackSegmentIndex> {
+        self.next_index(None)
+    }
+
+    pub fn last_index(&self) -> Option<TrackSegmentIndex> {
+        self.prev_index(None)
+    }
+
+    pub fn next_index(&self, cur: Option<TrackSegmentIndex>) -> Option<TrackSegmentIndex> {
+        let mut next = cur.map_or_default(|idx| TrackSegmentIndex {
+            chunk: idx.chunk,
+            pos: idx.pos + 1,
+            flat: idx.flat + 1,
+        });
+        loop {
+            if next.chunk >= self.chunks.len() {
+                return None;
+            }
+            if next.pos == self.chunks[next.chunk].trkpt.len() {
+                next.chunk += 1;
+                next.pos = 0;
+            } else {
+                return Some(next);
+            }
+        }
+    }
+
+    pub fn prev_index(&self, cur: Option<TrackSegmentIndex>) -> Option<TrackSegmentIndex> {
+        let mut prev = cur.unwrap_or(TrackSegmentIndex {
+            chunk: self.chunks.len(),
+            pos: 0,
+            flat: self.cumul_length.last().copied().unwrap_or_default(),
+        });
+        loop {
+            if prev.pos == 0 {
+                if prev.chunk == 0 {
+                    return None;
+                }
+                prev.chunk -= 1;
+                prev.pos = self.chunks[prev.chunk].trkpt.len();
+                prev.flat -= 1;
+            } else {
+                prev.pos -= 1;
+                prev.flat -= 1;
+                return Some(prev);
+            }
+        }
+    }
+
+    fn locate(&self, idx: usize) -> Option<TrackSegmentIndex> {
+        let chunk = self.cumul_length.partition_point(|l| idx >= *l);
+        if chunk >= self.chunks.len() {
+            return None;
+        }
+        let pos = if chunk > 0 {
+            idx - self.cumul_length[chunk - 1]
+        } else {
+            idx
+        };
+        if pos >= self.chunks[chunk].trkpt.len() {
+            None
+        } else {
+            Some(TrackSegmentIndex {
+                chunk,
+                pos,
+                flat: idx,
+            })
+        }
+    }
+}
+
+impl Index<TrackSegmentIndex> for TrackSegment {
+    type Output = Trackpoint;
+
+    fn index(&self, idx: TrackSegmentIndex) -> &Self::Output {
+        &self.chunks[idx.chunk].trkpt[idx.pos]
+    }
+}
+
+impl Index<usize> for TrackSegment {
+    type Output = Trackpoint;
+
+    fn index(&self, idx: usize) -> &Self::Output {
+        &self[self.locate(idx).unwrap()]
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default, PartialOrd, Ord)]
+pub struct TrackSegmentIndex {
+    pub chunk: usize,
+    pub pos: usize,
+    pub flat: usize,
+}
+
+#[derive(Debug, Clone)]
+pub struct TrackSegmentIterator<'a> {
+    trkseg: &'a TrackSegment,
+    idx: Option<TrackSegmentIndex>,
+}
+
+impl<'a> TrackSegmentIterator<'a> {
+    pub fn new(trkseg: &'a TrackSegment) -> Self {
+        Self {
+            trkseg,
+            idx: Default::default(),
+        }
+    }
+}
+
+impl<'a> Iterator for TrackSegmentIterator<'a> {
+    type Item = &'a Trackpoint;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.idx = self.trkseg.next_index(self.idx);
+        self.idx.map(|idx| &self.trkseg[idx])
+    }
+
+    fn nth(&mut self, n: usize) -> Option<Self::Item> {
+        let idx = self.idx.map_or_default(|idx| idx.flat) + n;
+        self.idx = self.trkseg.locate(idx);
+        self.idx.map(|idx| &self.trkseg[idx])
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::gpx::TrackpointChunk;
+
+    use super::*;
+
+    fn create_track_segment(nb_chunks: usize) -> TrackSegment {
+        let mut trkseg = TrackSegment::default();
+        let mut count = 0;
+        for n in 1..=nb_chunks {
+            let mut chunk = TrackpointChunk::default();
+            for _ in 0..n {
+                let mut trkpt = Trackpoint::default();
+                trkpt.ele = count as f64;
+                chunk.trkpt.push(trkpt);
+                count += 1;
+            }
+            trkseg.push(chunk);
+        }
+        trkseg
+    }
+
+    #[test]
+    fn test_len() {
+        let nb_chunks = 10;
+        let trkseg = create_track_segment(nb_chunks);
+        assert_eq!(trkseg.len(), nb_chunks * (nb_chunks + 1) / 2);
+    }
+
+    #[test]
+    fn test_locate() {
+        let nb_chunks = 10;
+        let trkseg = create_track_segment(nb_chunks);
+        for i in 0..trkseg.len() {
+            let idx = trkseg.locate(i);
+            assert!(idx.is_some());
+            assert_eq!(trkseg[idx.unwrap()].ele, i as f64);
+        }
+
+        assert!(trkseg.locate(trkseg.len()).is_none());
+    }
+
+    #[test]
+    fn test_index() {
+        let nb_chunks = 10;
+        let trkseg = create_track_segment(nb_chunks);
+        for i in 0..trkseg.len() {
+            assert_eq!(trkseg[i].ele, i as f64);
+        }
+    }
+
+    #[test]
+    #[should_panic]
+    fn test_index_out_of_bounds_1() {
+        let nb_chunks = 10;
+        let trkseg = create_track_segment(nb_chunks);
+        trkseg[trkseg.len()].ele;
+    }
+
+    #[test]
+    #[should_panic]
+    fn test_index_out_of_bounds_2() {
+        let nb_chunks = 10;
+        let trkseg = create_track_segment(nb_chunks);
+        trkseg[TrackSegmentIndex {
+            chunk: trkseg.chunks.len(),
+            pos: 0,
+            flat: 0,
+        }]
+        .ele;
+    }
+
+    #[test]
+    fn test_iter() {
+        let nb_chunks = 10;
+        let trkseg = create_track_segment(nb_chunks);
+        for (i, trkpt) in trkseg.iter().enumerate() {
+            assert!(std::ptr::eq(&trkseg[i], trkpt));
+        }
+    }
+
+    #[test]
+    fn test_iter_nth() {
+        let nb_chunks = 10;
+        let trkseg = create_track_segment(nb_chunks);
+        let tenth = trkseg.iter().nth(10);
+        assert!(tenth.is_some());
+        assert!(std::ptr::eq(&trkseg[10], tenth.unwrap()));
+    }
+
+    #[test]
+    fn test_iter_skip() {
+        let nb_chunks = 10;
+        let trkseg = create_track_segment(nb_chunks);
+        for (i, trkpt) in trkseg.iter().enumerate().skip(5) {
+            assert!(std::ptr::eq(&trkseg[i], trkpt));
+        }
+    }
+}
@@ -0,0 +1,32 @@
+use uuid::Uuid;
+
+use crate::gpx::{Link, TrackSegment};
+
+#[derive(Debug, PartialEq, Eq, Hash)]
+pub struct TrackId(Uuid);
+
+impl Default for TrackId {
+    fn default() -> Self {
+        Self(Uuid::new_v4())
+    }
+}
+
+#[derive(Debug, Default, PartialEq)]
+pub struct Track {
+    pub id: TrackId,
+    pub info: TrackInfo,
+    pub trkseg: Vec<TrackSegment>,
+}
+
+#[derive(Debug, Default, PartialEq)]
+pub struct TrackInfo {
+    pub name: Option<String>,
+    pub cmt: Option<String>,
+    pub desc: Option<String>,
+    pub src: Option<String>,
+    pub link: Option<Link>,
+    pub type_: Option<String>,
+    pub color: Option<String>,
+    pub opacity: Option<f64>,
+    pub width: Option<f64>,
+}
@@ -0,0 +1,13 @@
+use crate::gpx::LngLat;
+
+#[derive(Debug, Default)]
+pub struct Trackpoint {
+    pub coordinates: LngLat,
+    pub ele: f64,
+    pub time: Option<i64>,
+    pub atemp: Option<i16>,
+    pub hr: Option<u16>,
+    pub cad: Option<u16>,
+    pub power: Option<u16>,
+    // TODO OSM data? or store intervals at a higher level?
+}
@@ -0,0 +1,26 @@
+use uuid::Uuid;
+
+use crate::gpx::{Link, LngLat};
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct WaypointId(Uuid);
+
+impl Default for WaypointId {
+    fn default() -> Self {
+        Self(Uuid::new_v4())
+    }
+}
+
+#[derive(Debug, Default)]
+pub struct Waypoint {
+    pub id: WaypointId,
+    pub coordinates: LngLat,
+    pub ele: f64,
+    pub time: Option<i64>,
+    pub name: Option<String>,
+    pub cmt: Option<String>,
+    pub desc: Option<String>,
+    pub link: Option<Link>,
+    pub sym: Option<String>,
+    pub type_: Option<String>,
+}
@@ -0,0 +1,3 @@
+mod parse;
+
+pub use parse::*;
@@ -0,0 +1,637 @@
+use std::rc::Rc;
+
+use crate::gpx::{
+    Author, File, Link, LngLat, Track, TrackSegment, Trackpoint, TrackpointChunk, Waypoint,
+    WaypointChunk,
+};
+use chrono::DateTime;
+use quick_xml::Error;
+use quick_xml::events::Event;
+use quick_xml::events::attributes::Attributes;
+use quick_xml::reader::Reader;
+
+enum GPXElement {
+    Metadata,
+    Name,
+    Comment,
+    Description,
+    Source,
+    Author(Author),
+    Link(Link),
+    Text,
+    Track(Track),
+    Segment(TrackSegment),
+    Trackpoint(Trackpoint),
+    Waypoint(Waypoint),
+    Elevation,
+    Time,
+    Temperature,
+    Heartrate,
+    Cadence,
+    Power,
+    Symbol,
+    Type,
+    Color,
+    Opacity,
+    Width,
+}
+
+fn parse_coordinates(attributes: Attributes<'_>) -> LngLat {
+    let mut coordinates = LngLat::default();
+    for attr in attributes {
+        if let Ok(attr) = attr {
+            match attr.key.as_ref() {
+                "lat" => coordinates.lat = attr.value.parse().unwrap_or_default(),
+                "lon" => coordinates.lng = attr.value.parse().unwrap_or_default(),
+                _ => (),
+            }
+        }
+    }
+    coordinates
+}
+
+pub fn parse(data: &[u8]) -> Result<File, Error> {
+    let mut reader = Reader::from_reader(data);
+    let mut buf = vec![];
+    let mut gpx = File::default();
+    let mut stack: Vec<GPXElement> = vec![];
+    let mut trkpt_chunk = TrackpointChunk::default();
+    let mut wpt_chunk = WaypointChunk::default();
+    loop {
+        match reader.read_event_into(&mut buf) {
+            Ok(Event::Start(e)) => match e.name().as_ref() {
+                "metadata" => stack.push(GPXElement::Metadata),
+                "name" => stack.push(GPXElement::Name),
+                "cmt" => stack.push(GPXElement::Comment),
+                "desc" => stack.push(GPXElement::Description),
+                "src" => stack.push(GPXElement::Source),
+                "author" => stack.push(GPXElement::Author(Author::default())),
+                "link" => {
+                    let mut link = Link::default();
+                    for attr in e.attributes() {
+                        if let Ok(attr) = attr {
+                            if attr.key.as_ref() == "href" {
+                                link.href = attr.value.to_string();
+                            }
+                        }
+                    }
+                    stack.push(GPXElement::Link(link));
+                }
+                "text" => stack.push(GPXElement::Text),
+                "trk" => stack.push(GPXElement::Track(Track::default())),
+                "trkseg" => {
+                    stack.push(GPXElement::Segment(TrackSegment::default()));
+                }
+                "trkpt" => {
+                    let mut trkpt = Trackpoint::default();
+                    trkpt.coordinates = parse_coordinates(e.attributes());
+                    stack.push(GPXElement::Trackpoint(trkpt));
+                }
+                "wpt" => {
+                    let mut wpt = Waypoint::default();
+                    wpt.coordinates = parse_coordinates(e.attributes());
+                    stack.push(GPXElement::Waypoint(wpt));
+                }
+                "ele" => stack.push(GPXElement::Elevation),
+                "time" => stack.push(GPXElement::Time),
+                e if e.ends_with("atemp") => stack.push(GPXElement::Temperature),
+                e if e.ends_with("hr") => stack.push(GPXElement::Heartrate),
+                e if e.ends_with("cad") => stack.push(GPXElement::Cadence),
+                "power" => stack.push(GPXElement::Power),
+                e if e.ends_with("PowerInWatts") => stack.push(GPXElement::Power),
+                "sym" => stack.push(GPXElement::Symbol),
+                "type" => stack.push(GPXElement::Type),
+                e if e.ends_with("color") => stack.push(GPXElement::Color),
+                e if e.ends_with("opacity") => stack.push(GPXElement::Opacity),
+                e if e.ends_with("width") => stack.push(GPXElement::Width),
+                _ => (),
+            },
+            Ok(Event::End(e)) => match e.name().as_ref() {
+                "gpx" => {
+                    if !wpt_chunk.wpt.is_empty() {
+                        gpx.wpt.push(Rc::new(wpt_chunk));
+                        wpt_chunk = WaypointChunk::default();
+                    }
+                }
+                "metadata" => {
+                    stack.pop();
+                }
+                "author" => {
+                    if let Some(GPXElement::Author(author)) = stack.pop() {
+                        gpx.info.author = Some(author);
+                    }
+                }
+                "link" => {
+                    if let Some(GPXElement::Link(link)) = stack.pop() {
+                        match stack.last_mut() {
+                            Some(GPXElement::Author(author)) => {
+                                author.link = Some(link);
+                            }
+                            Some(GPXElement::Track(trk)) => {
+                                trk.info.link = Some(link);
+                            }
+                            Some(GPXElement::Waypoint(wpt)) => {
+                                wpt.link = Some(link);
+                            }
+                            _ => (),
+                        }
+                    }
+                }
+                "trk" => {
+                    if let Some(GPXElement::Track(trk)) = stack.pop() {
+                        gpx.trk.push(trk);
+                    }
+                }
+                "trkseg" => {
+                    if let Some(GPXElement::Segment(mut trkseg)) = stack.pop() {
+                        if let Some(GPXElement::Track(trk)) = stack.last_mut() {
+                            if !trkpt_chunk.trkpt.is_empty() {
+                                trkseg.push(trkpt_chunk);
+                                trkpt_chunk = TrackpointChunk::default();
+                            }
+                            trk.trkseg.push(trkseg);
+                        }
+                    }
+                }
+                "trkpt" => {
+                    if let Some(GPXElement::Trackpoint(trkpt)) = stack.pop() {
+                        if let Some(GPXElement::Segment(trkseg)) = stack.last_mut() {
+                            trkpt_chunk.trkpt.push(trkpt);
+                            if trkpt_chunk.is_full() {
+                                trkseg.push(trkpt_chunk);
+                                trkpt_chunk = TrackpointChunk::default();
+                            }
+                        }
+                    }
+                }
+                "wpt" => {
+                    if let Some(GPXElement::Waypoint(wpt)) = stack.pop() {
+                        wpt_chunk.wpt.push(wpt);
+                        if wpt_chunk.is_full() {
+                            gpx.wpt.push(Rc::new(wpt_chunk));
+                            wpt_chunk = WaypointChunk::default();
+                        }
+                    }
+                }
+                _ => (),
+            },
+            Ok(Event::Text(e)) => match stack.last_mut() {
+                Some(GPXElement::Name) => {
+                    stack.pop();
+                    match stack.last_mut() {
+                        Some(GPXElement::Metadata) => {
+                            gpx.info.name = e.to_string();
+                        }
+                        Some(GPXElement::Author(author)) => {
+                            author.name = Some(e.to_string());
+                        }
+                        Some(GPXElement::Track(trk)) => {
+                            trk.info.name = Some(e.to_string());
+                        }
+                        Some(GPXElement::Waypoint(wpt)) => {
+                            wpt.name = Some(e.to_string());
+                        }
+                        _ => (),
+                    }
+                }
+                Some(GPXElement::Comment) => {
+                    stack.pop();
+                    match stack.last_mut() {
+                        Some(GPXElement::Track(trk)) => {
+                            trk.info.cmt = Some(e.to_string());
+                        }
+                        Some(GPXElement::Waypoint(wpt)) => {
+                            wpt.cmt = Some(e.to_string());
+                        }
+                        _ => (),
+                    }
+                }
+                Some(GPXElement::Description) => {
+                    stack.pop();
+                    match stack.last_mut() {
+                        Some(GPXElement::Metadata) => {
+                            gpx.info.desc = Some(e.to_string());
+                        }
+                        Some(GPXElement::Track(trk)) => {
+                            trk.info.desc = Some(e.to_string());
+                        }
+                        Some(GPXElement::Waypoint(wpt)) => {
+                            wpt.desc = Some(e.to_string());
+                        }
+                        _ => (),
+                    }
+                }
+                Some(GPXElement::Source) => {
+                    stack.pop();
+                    match stack.last_mut() {
+                        Some(GPXElement::Track(trk)) => {
+                            trk.info.src = Some(e.to_string());
+                        }
+                        _ => (),
+                    }
+                }
+                Some(GPXElement::Text) => {
+                    stack.pop();
+                    if let Some(GPXElement::Link(link)) = stack.last_mut() {
+                        link.text = Some(e.to_string());
+                    }
+                }
+                Some(GPXElement::Elevation) => {
+                    stack.pop();
+                    match stack.last_mut() {
+                        Some(GPXElement::Trackpoint(trkpt)) => {
+                            trkpt.ele = e.parse().unwrap_or_default();
+                        }
+                        Some(GPXElement::Waypoint(wpt)) => {
+                            wpt.ele = e.parse().unwrap_or_default();
+                        }
+                        _ => (),
+                    }
+                }
+                Some(GPXElement::Time) => {
+                    stack.pop();
+                    if let Some(GPXElement::Trackpoint(trkpt)) = stack.last_mut() {
+                        if let Ok(time) = DateTime::parse_from_rfc3339(e.as_ref()) {
+                            trkpt.time = Some(time.timestamp_millis());
+                        }
+                    }
+                }
+                Some(GPXElement::Temperature) => {
+                    stack.pop();
+                    if let Some(GPXElement::Trackpoint(trkpt)) = stack.last_mut() {
+                        trkpt.atemp = e.parse().ok();
+                    }
+                }
+                Some(GPXElement::Heartrate) => {
+                    stack.pop();
+                    if let Some(GPXElement::Trackpoint(trkpt)) = stack.last_mut() {
+                        trkpt.hr = e.parse().ok();
+                    }
+                }
+                Some(GPXElement::Cadence) => {
+                    stack.pop();
+                    if let Some(GPXElement::Trackpoint(trkpt)) = stack.last_mut() {
+                        trkpt.cad = e.parse().ok();
+                    }
+                }
+                Some(GPXElement::Power) => {
+                    stack.pop();
+                    if let Some(GPXElement::Trackpoint(trkpt)) = stack.last_mut() {
+                        trkpt.power = e.parse().ok();
+                    }
+                }
+                Some(GPXElement::Symbol) => {
+                    stack.pop();
+                    match stack.last_mut() {
+                        Some(GPXElement::Waypoint(wpt)) => {
+                            wpt.sym = Some(e.to_string());
+                        }
+                        _ => (),
+                    }
+                }
+                Some(GPXElement::Type) => {
+                    stack.pop();
+                    match stack.last_mut() {
+                        Some(GPXElement::Track(trk)) => {
+                            trk.info.type_ = Some(e.to_string());
+                        }
+                        Some(GPXElement::Waypoint(wpt)) => {
+                            wpt.type_ = Some(e.to_string());
+                        }
+                        _ => (),
+                    }
+                }
+                Some(GPXElement::Color) => {
+                    stack.pop();
+                    match stack.last_mut() {
+                        Some(GPXElement::Track(trk)) => {
+                            let mut color = "#".to_string();
+                            color.push_str(&e);
+                            trk.info.color = Some(color);
+                        }
+                        _ => (),
+                    }
+                }
+                Some(GPXElement::Opacity) => {
+                    stack.pop();
+                    match stack.last_mut() {
+                        Some(GPXElement::Track(trk)) => {
+                            trk.info.opacity = e.parse().ok();
+                        }
+                        _ => (),
+                    }
+                }
+                Some(GPXElement::Width) => {
+                    stack.pop();
+                    match stack.last_mut() {
+                        Some(GPXElement::Track(trk)) => {
+                            trk.info.width = e.parse().ok();
+                        }
+                        _ => (),
+                    }
+                }
+                _ => (),
+            },
+            Ok(Event::Eof) => break,
+            Err(e) => return Err(e),
+            _ => (),
+        }
+        buf.clear();
+    }
+    Ok(gpx)
+}
+
+#[cfg(test)]
+mod tests {
+    use std::{fs::File, io::Read};
+
+    use super::*;
+
+    #[test]
+    fn test_parse_simple() {
+        let mut f = File::open("data/simple.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.info.name, "simple");
+        assert!(gpx.info.desc.is_some_and(|d| d == "description"));
+        assert!(gpx.info.author.is_some());
+        let author = gpx.info.author.as_ref().unwrap();
+        assert!(author.name.as_ref().is_some_and(|n| n == "gpx.studio"));
+        assert!(author.link.is_some());
+        let link = author.link.as_ref().unwrap();
+        assert_eq!(link.href, "https://gpx.studio");
+        assert!(link.text.as_ref().is_some_and(|t| t == "link text"));
+
+        assert_eq!(gpx.trk.len(), 1);
+        let trk = &gpx.trk[0];
+        assert!(trk.info.name.as_ref().is_some_and(|n| n == "track name"));
+        assert!(trk.info.cmt.as_ref().is_some_and(|c| c == "track comment"));
+        assert!(
+            trk.info
+                .desc
+                .as_ref()
+                .is_some_and(|d| d == "track description")
+        );
+        assert!(trk.info.src.as_ref().is_some_and(|s| s == "track source"));
+        assert!(trk.info.link.is_some());
+        let link = trk.info.link.as_ref().unwrap();
+        assert_eq!(link.href, "https://gpx.studio");
+        assert!(link.text.as_ref().is_some_and(|t| t == "track link text"));
+        assert!(trk.info.type_.as_ref().is_some_and(|c| c == "Cycling"));
+
+        assert_eq!(trk.trkseg.len(), 1);
+        let trkseg = &trk.trkseg[0];
+        assert_eq!(trkseg.len(), 80);
+        let trkpt = &trkseg[0];
+        assert_eq!(trkpt.coordinates.lat, 50.790867);
+        assert_eq!(trkpt.coordinates.lng, 4.404968);
+        assert_eq!(trkpt.ele, 109.0);
+    }
+
+    #[test]
+    fn test_parse_tracks() {
+        let mut f = File::open("data/with_tracks.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.trk.len(), 2);
+        let trk = &gpx.trk[0];
+        assert!(trk.info.name.as_ref().is_some_and(|n| n == "track 1"));
+        assert!(trk.info.type_.as_ref().is_some_and(|c| c == "Cycling"));
+
+        assert_eq!(trk.trkseg.len(), 1);
+        let trkseg = &trk.trkseg[0];
+        assert_eq!(trkseg.len(), 49);
+        let trkpt = &trkseg[0];
+        assert_eq!(trkpt.coordinates.lat, 50.790867);
+        assert_eq!(trkpt.coordinates.lng, 4.404968);
+        assert_eq!(trkpt.ele, 109.0);
+
+        let trk = &gpx.trk[1];
+        assert!(trk.info.name.as_ref().is_some_and(|n| n == "track 2"));
+        assert!(trk.info.type_.as_ref().is_some_and(|c| c == "Cycling"));
+
+        assert_eq!(trk.trkseg.len(), 1);
+        let trkseg = &trk.trkseg[0];
+        assert_eq!(trkseg.len(), 28);
+        let trkpt = &trkseg[0];
+        assert_eq!(trkpt.coordinates.lat, 50.782212);
+        assert_eq!(trkpt.coordinates.lng, 4.406377);
+        assert_eq!(trkpt.ele, 115.5);
+    }
+
+    #[test]
+    fn test_parse_segments() {
+        let mut f = File::open("data/with_segments.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.trk.len(), 1);
+        let trk = &gpx.trk[0];
+
+        assert_eq!(trk.trkseg.len(), 2);
+        let trkseg = &trk.trkseg[0];
+        assert_eq!(trkseg.len(), 49);
+        let trkpt = &trkseg[0];
+        assert_eq!(trkpt.coordinates.lat, 50.790867);
+        assert_eq!(trkpt.coordinates.lng, 4.404968);
+        assert_eq!(trkpt.ele, 109.0);
+
+        let trkseg = &trk.trkseg[1];
+        assert_eq!(trkseg.len(), 28);
+        let trkpt = &trkseg[0];
+        assert_eq!(trkpt.coordinates.lat, 50.782212);
+        assert_eq!(trkpt.coordinates.lng, 4.406377);
+        assert_eq!(trkpt.ele, 115.5);
+    }
+
+    #[test]
+    fn test_parse_tracks_and_segments() {
+        let mut f = File::open("data/with_tracks_and_segments.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.trk.len(), 2);
+        let trk = &gpx.trk[0];
+
+        assert_eq!(trk.trkseg.len(), 2);
+        let trkseg = &trk.trkseg[0];
+        assert_eq!(trkseg.len(), 16);
+        let trkpt = &trkseg[0];
+        assert_eq!(trkpt.coordinates.lat, 50.790867);
+        assert_eq!(trkpt.coordinates.lng, 4.404968);
+        assert_eq!(trkpt.ele, 109.0);
+
+        let trkseg = &trk.trkseg[1];
+        assert_eq!(trkseg.len(), 34);
+        let trkpt = &trkseg[0];
+        assert_eq!(trkpt.coordinates.lat, 50.78727108169855);
+        assert_eq!(trkpt.coordinates.lng, 4.406133681127736);
+        assert_eq!(trkpt.ele, 115.0);
+
+        let trk = &gpx.trk[1];
+
+        assert_eq!(trk.trkseg.len(), 2);
+        let trkseg = &trk.trkseg[0];
+        assert_eq!(trkseg.len(), 19);
+        let trkpt = &trkseg[0];
+        assert_eq!(trkpt.coordinates.lat, 50.782212);
+        assert_eq!(trkpt.coordinates.lng, 4.406377);
+        assert_eq!(trkpt.ele, 115.5);
+
+        let trkseg = &trk.trkseg[1];
+        assert_eq!(trkseg.len(), 10);
+        let trkpt = &trkseg[0];
+        assert_eq!(trkpt.coordinates.lat, 50.77906316558724);
+        assert_eq!(trkpt.coordinates.lng, 4.412547477922485);
+        assert_eq!(trkpt.ele, 133.3);
+    }
+
+    #[test]
+    fn test_parse_waypoint() {
+        let mut f = File::open("data/with_waypoint.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.wpt.len(), 1);
+        let chunk = &gpx.wpt[0];
+        assert_eq!(chunk.wpt.len(), 1);
+        let wpt = &chunk.wpt[0];
+        assert_eq!(wpt.coordinates.lat, 50.7836710064975);
+        assert_eq!(wpt.coordinates.lng, 4.410764082658738);
+        assert!(wpt.name.as_ref().is_some_and(|n| n == "waypoint name"));
+        assert!(wpt.cmt.as_ref().is_some_and(|c| c == "waypoint comment"));
+        assert!(
+            wpt.desc
+                .as_ref()
+                .is_some_and(|d| d == "waypoint description")
+        );
+        assert!(wpt.link.is_some());
+        let link = wpt.link.as_ref().unwrap();
+        assert_eq!(link.href, "https://gpx.studio");
+        assert!(
+            link.text
+                .as_ref()
+                .is_some_and(|t| t == "waypoint link text")
+        );
+        assert!(wpt.sym.as_ref().is_some_and(|s| s == "Bike Trail"));
+        assert!(wpt.type_.as_ref().is_some_and(|t| t == "Bike Trail"));
+    }
+
+    #[test]
+    fn test_parse_trackpoint_time() {
+        let mut f = File::open("data/with_time.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.trk.len(), 1);
+        let trk = &gpx.trk[0];
+        assert_eq!(trk.trkseg.len(), 1);
+        let trkseg = &trk.trkseg[0];
+        assert!(trkseg.len() > 0);
+        let trkpt = &trkseg[0];
+        assert!(trkpt.time.is_some_and(|t| t == 1704063600000));
+    }
+
+    #[test]
+    fn test_parse_trackpoint_hr() {
+        let mut f = File::open("data/with_hr.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.trk.len(), 1);
+        let trk = &gpx.trk[0];
+        assert_eq!(trk.trkseg.len(), 1);
+        let trkseg = &trk.trkseg[0];
+        assert!(trkseg.len() > 0);
+        let trkpt = &trkseg[0];
+        assert!(trkpt.hr.is_some_and(|h| h == 150));
+    }
+
+    #[test]
+    fn test_parse_trackpoint_cad() {
+        let mut f = File::open("data/with_cad.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.trk.len(), 1);
+        let trk = &gpx.trk[0];
+        assert_eq!(trk.trkseg.len(), 1);
+        let trkseg = &trk.trkseg[0];
+        assert!(trkseg.len() > 0);
+        let trkpt = &trkseg[0];
+        assert!(trkpt.cad.is_some_and(|c| c == 80));
+    }
+
+    #[test]
+    fn test_parse_trackpoint_power_1() {
+        let mut f = File::open("data/with_power_1.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.trk.len(), 1);
+        let trk = &gpx.trk[0];
+        assert_eq!(trk.trkseg.len(), 1);
+        let trkseg = &trk.trkseg[0];
+        assert!(trkseg.len() > 0);
+        let trkpt = &trkseg[0];
+        assert!(trkpt.power.is_some_and(|p| p == 200));
+    }
+
+    #[test]
+    fn test_parse_trackpoint_power_2() {
+        let mut f = File::open("data/with_power_2.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.trk.len(), 1);
+        let trk = &gpx.trk[0];
+        assert_eq!(trk.trkseg.len(), 1);
+        let trkseg = &trk.trkseg[0];
+        assert!(trkseg.len() > 0);
+        let trkpt = &trkseg[0];
+        assert!(trkpt.power.is_some_and(|p| p == 200));
+    }
+
+    #[test]
+    fn test_parse_trackpoint_atemp() {
+        let mut f = File::open("data/with_temp.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.trk.len(), 1);
+        let trk = &gpx.trk[0];
+        assert_eq!(trk.trkseg.len(), 1);
+        let trkseg = &trk.trkseg[0];
+        assert!(trkseg.len() > 0);
+        let trkpt = &trkseg[0];
+        assert!(trkpt.atemp.is_some_and(|t| t == 21));
+    }
+
+    #[test]
+    fn test_parse_track_style() {
+        let mut f = File::open("data/with_style.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        assert_eq!(gpx.trk.len(), 1);
+        let trk = &gpx.trk[0];
+        assert_eq!(trk.trkseg.len(), 1);
+        assert!(trk.info.color.as_ref().is_some_and(|c| c == "#2d3ee9"));
+        assert!(trk.info.opacity.is_some_and(|o| o == 0.5));
+        assert!(trk.info.width.is_some_and(|w| w == 6.0));
+    }
+}
@@ -0,0 +1,12 @@
+mod action;
+mod algorithm;
+mod buffer;
+mod engine;
+mod gpx;
+mod io;
+mod selection;
+mod state;
+mod statistics;
+mod utils;
+
+pub use engine::*;
@@ -0,0 +1,51 @@
+use std::collections::HashSet;
+
+use crate::gpx::{FileId, TrackId, TrackSegmentId, WaypointId};
+
+#[derive(Debug)]
+pub struct FileSelection {
+    pub files: HashSet<FileId>,
+}
+
+#[derive(Debug)]
+pub struct TrackSelection {
+    pub file: FileId,
+    pub trk: HashSet<TrackId>,
+}
+
+#[derive(Debug)]
+pub struct TrackSegmentSelection {
+    pub file: FileId,
+    pub trk: TrackId,
+    pub trkseg: HashSet<TrackSegmentId>,
+}
+
+#[derive(Debug)]
+pub struct WaypointsSelection {
+    pub file: FileId,
+}
+
+#[derive(Debug)]
+pub struct WaypointSelection {
+    pub file: FileId,
+    pub wpt: HashSet<WaypointId>,
+}
+
+#[derive(Debug, Default)]
+pub enum Selection {
+    #[default]
+    Empty,
+    File(FileSelection),
+    Track(TrackSelection),
+    TrackSegment(TrackSegmentSelection),
+    Waypoints(WaypointsSelection),
+    Waypoint(WaypointSelection),
+}
+
+impl Selection {
+    pub fn select(&mut self, id: FileId) {
+        let mut files = HashSet::default();
+        files.insert(id);
+        *self = Selection::File(FileSelection { files });
+    }
+}
@@ -0,0 +1,3 @@
+mod stack;
+
+pub use stack::*;
@@ -0,0 +1,158 @@
+use std::{
+    collections::{HashMap, HashSet},
+    rc::Rc,
+};
+
+use crate::gpx::{File, FileId};
+
+#[derive(Debug, Default)]
+pub struct Stack {
+    entries: Vec<StackEntry>,
+    index: Option<usize>,
+}
+
+impl Stack {
+    pub fn current(&self) -> Option<&StackEntry> {
+        self.index.map_or_default(|i| self.get(i))
+    }
+
+    pub fn create_and_push_next<F>(&mut self, f: F) -> Option<Diff>
+    where
+        F: FnOnce(&mut StackEntry) -> bool,
+    {
+        self.record_diff(|stack| {
+            let mut next = stack.current().map_or_default(|c| c.clone());
+            if f(&mut next) {
+                stack.push(next);
+            }
+        })
+    }
+
+    pub fn undo(&mut self) -> Option<Diff> {
+        self.record_diff(|stack| {
+            if let Some(i) = stack.index {
+                if i == 0 {
+                    stack.index = None;
+                } else {
+                    stack.index = Some(i - 1);
+                }
+            }
+        })
+    }
+
+    pub fn redo(&mut self) -> Option<Diff> {
+        self.record_diff(|stack| match stack.index {
+            Some(i) => {
+                if i + 1 < stack.entries.len() {
+                    stack.index = Some(i + 1);
+                }
+            }
+            None => {
+                if !stack.entries.is_empty() {
+                    stack.index = Some(0);
+                }
+            }
+        })
+    }
+
+    pub fn can_undo(&self) -> bool {
+        self.index.is_some()
+    }
+
+    pub fn can_redo(&self) -> bool {
+        match self.index {
+            Some(i) => i + 1 < self.entries.len(),
+            None => !self.entries.is_empty(),
+        }
+    }
+
+    fn get(&self, index: usize) -> Option<&StackEntry> {
+        if index < self.entries.len() {
+            Some(&self.entries[index])
+        } else {
+            None
+        }
+    }
+
+    fn push(&mut self, entry: StackEntry) {
+        if let Some(i) = self.index {
+            if i + 1 < self.entries.len() {
+                self.entries.truncate(i + 1);
+            }
+        }
+
+        self.entries.push(entry);
+        self.index = Some(self.entries.len() - 1);
+    }
+
+    fn record_diff<F>(&mut self, f: F) -> Option<Diff>
+    where
+        F: FnOnce(&mut Self),
+    {
+        let prev = self.index;
+        f(self);
+        let cur = self.index;
+        if prev == cur {
+            return None;
+        }
+        let prev = prev.map_or_default(|i| self.get(i));
+        let cur = cur.map_or_default(|i| self.get(i));
+        let prev_ids: HashSet<FileId> = prev.map_or_default(|e| e.keys().copied().collect());
+        let cur_ids: HashSet<FileId> = cur.map_or_default(|e| e.keys().copied().collect());
+        let mut modified = vec![];
+        for id in prev_ids.intersection(&cur_ids) {
+            let before = prev.map_or_default(|e| e.get(id));
+            let after = cur.map_or_default(|e| e.get(id));
+            if before != after {
+                modified.push(*id);
+            }
+        }
+        Some(Diff {
+            added: cur_ids.difference(&prev_ids).copied().collect(),
+            removed: prev_ids.difference(&cur_ids).copied().collect(),
+            modified,
+        })
+    }
+}
+
+pub type StackEntry = HashMap<FileId, Rc<File>>;
+
+#[derive(Debug, Default)]
+pub struct Diff {
+    pub added: Vec<FileId>,
+    pub removed: Vec<FileId>,
+    pub modified: Vec<FileId>,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_new_file() {
+        let mut stack = Stack::default();
+
+        assert!(!stack.can_undo());
+        assert!(!stack.can_redo());
+        assert!(stack.current().is_none());
+
+        let diff = stack.create_and_push_next(|e| {
+            let file = Rc::new(File::default());
+            e.insert(file.id, file);
+            true
+        });
+
+        assert!(stack.can_undo());
+        assert!(!stack.can_redo());
+        assert!(stack.current().is_some());
+
+        assert!(diff.is_some());
+
+        let diff = diff.unwrap();
+        assert_eq!(diff.added.len(), 1);
+        assert!(diff.removed.is_empty());
+        assert!(diff.modified.is_empty());
+    }
+
+    // TODO more tests
+}
@@ -0,0 +1,113 @@
+use std::{
+    collections::{HashMap, HashSet, hash_map::Entry},
+    rc::Rc,
+};
+
+use crate::{
+    gpx::{File, Track, TrackSegment, TrackSegmentRevisionId},
+    selection::Selection,
+    state::StackEntry,
+    statistics::Statistics,
+};
+
+#[derive(Debug, Default)]
+pub struct StatisticsCache {
+    map: HashMap<TrackSegmentRevisionId, Statistics>,
+}
+
+impl StatisticsCache {
+    pub fn update(&mut self, state: Option<&StackEntry>) {
+        let mut stale: HashSet<TrackSegmentRevisionId> = self.map.keys().copied().collect();
+        if let Some(state) = state {
+            for file in state.values() {
+                for trk in file.trk.iter() {
+                    for trkseg in trk.trkseg.iter() {
+                        match self.map.entry(trkseg.rev_id) {
+                            Entry::Occupied(_) => {
+                                stale.remove(&trkseg.rev_id);
+                            }
+                            Entry::Vacant(e) => {
+                                e.insert(Statistics::compute(trkseg));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        for id in stale.iter() {
+            self.map.remove(id);
+        }
+    }
+
+    pub fn get<'a>(
+        &'a self,
+        state: Option<&StackEntry>,
+        selection: &Selection,
+    ) -> Vec<&'a Statistics> {
+        let mut stats = vec![];
+        if let Some(state) = state {
+            match selection {
+                Selection::Empty => (),
+                Selection::File(s) => {
+                    for id in s.files.iter() {
+                        if let Some(file) = state.get(id) {
+                            self.add_file_stats(file, &mut stats);
+                        }
+                    }
+                }
+                Selection::Track(s) => {
+                    if let Some(file) = state.get(&s.file) {
+                        for trk in file.trk.iter() {
+                            if s.trk.contains(&trk.id) {
+                                self.add_track_stats(trk, &mut stats);
+                            }
+                        }
+                    }
+                }
+                Selection::TrackSegment(s) => {
+                    if let Some(file) = state.get(&s.file) {
+                        for trk in file.trk.iter() {
+                            if s.trk == trk.id {
+                                for trkseg in trk.trkseg.iter() {
+                                    if s.trkseg.contains(&trkseg.id) {
+                                        self.add_segment_stats(trkseg, &mut stats);
+                                    }
+                                }
+                                break;
+                            }
+                        }
+                    }
+                }
+                Selection::Waypoints(s) => {
+                    if let Some(file) = state.get(&s.file) {
+                        self.add_file_stats(file, &mut stats);
+                    }
+                }
+                Selection::Waypoint(s) => {
+                    if let Some(file) = state.get(&s.file) {
+                        self.add_file_stats(file, &mut stats);
+                    }
+                }
+            }
+        }
+        stats
+    }
+
+    fn add_file_stats<'a>(&'a self, file: &Rc<File>, stats: &mut Vec<&'a Statistics>) {
+        for trk in file.trk.iter() {
+            self.add_track_stats(trk, stats);
+        }
+    }
+
+    fn add_track_stats<'a>(&'a self, trk: &Track, stats: &mut Vec<&'a Statistics>) {
+        for trkseg in trk.trkseg.iter() {
+            self.add_segment_stats(trkseg, stats);
+        }
+    }
+
+    fn add_segment_stats<'a>(&'a self, trkseg: &TrackSegment, stats: &mut Vec<&'a Statistics>) {
+        if let Some(s) = self.map.get(&trkseg.rev_id) {
+            stats.push(s);
+        }
+    }
+}
@@ -0,0 +1,7 @@
+mod cache;
+mod statistics;
+mod utils;
+
+pub use cache::*;
+pub use statistics::*;
+pub use utils::*;
@@ -0,0 +1,316 @@
+use crate::{
+    algorithm::ramer_douglas_peucker,
+    for_each_window,
+    gpx::{LngLat, LngLatBounds, TrackSegment, TrackSegmentIndex, Trackpoint},
+    statistics::sum_options,
+    utils::{distance, slope, speed, time_diff},
+};
+
+#[derive(Default, Debug)]
+pub struct Statistics {
+    pub global: GlobalStatistics,
+    pub local: Vec<TrackpointStatistics>,
+}
+
+impl Statistics {
+    pub fn total_time(&self) -> Option<i32> {
+        self.global.total_time()
+    }
+
+    pub fn total_speed(&self) -> Option<f64> {
+        self.global.total_speed()
+    }
+
+    pub fn moving_speed(&self) -> Option<f64> {
+        self.global.moving_speed()
+    }
+
+    pub fn compute(trkseg: &TrackSegment) -> Self {
+        let mut stats = Self::default();
+        if trkseg.len() == 0 {
+            return stats;
+        }
+
+        let mut prev = &trkseg[0];
+        for cur in trkseg.iter() {
+            stats.accumulate(prev, cur);
+            prev = cur;
+        }
+
+        stats.compute_smoothed_speed(trkseg);
+        stats.compute_smoothed_elevation_segments(trkseg);
+        stats.compute_smoothed_slope(trkseg);
+
+        stats
+    }
+
+    fn accumulate(&mut self, prev: &Trackpoint, cur: &Trackpoint) {
+        self.accumulate_distance_and_time(prev, cur);
+        self.update_time_bounds(cur.time);
+        self.update_bounds(cur.coordinates);
+        self.local
+            .push(TrackpointStatistics::from_partial_stats(&self));
+    }
+
+    fn accumulate_distance_and_time(&mut self, prev: &Trackpoint, cur: &Trackpoint) {
+        let dist = distance(prev.coordinates, cur.coordinates);
+        let time = time_diff(&cur.time, &prev.time);
+
+        self.global.total_distance += dist;
+
+        if let Some(time) = time {
+            let speed = speed(dist, time);
+            if speed >= 0.5 && speed <= 1500.0 {
+                self.global.moving_distance = self
+                    .global
+                    .moving_distance
+                    .map_or(Some(dist), |d| Some(d + dist));
+                self.global.moving_time = self
+                    .global
+                    .moving_time
+                    .map_or(Some(time), |t| Some(t + time));
+            }
+        }
+    }
+
+    fn update_time_bounds(&mut self, time: Option<i64>) {
+        if let Some(time) = time {
+            if self.global.start_time.is_none() {
+                self.global.start_time = Some(time);
+            }
+            self.global.end_time = Some(time);
+        }
+    }
+
+    fn update_bounds(&mut self, coordinates: LngLat) {
+        self.global.bounds.extend(coordinates);
+    }
+
+    fn compute_smoothed_speed(&mut self, trkseg: &TrackSegment) {
+        for_each_window!(
+            trkseg,
+            trkseg.first_index(),
+            trkseg.last_index(),
+            Some(10000),
+            |i, j| time_diff(&trkseg[i].time, &trkseg[j].time),
+            |i, left, right| {
+                self.local[i.flat].speed =
+                    time_diff(&trkseg[right].time, &trkseg[left].time).map(|t| {
+                        speed(
+                            self.local[right.flat].total_distance
+                                - self.local[left.flat].total_distance,
+                            t,
+                        )
+                    });
+            },
+        );
+    }
+
+    fn compute_smoothed_elevation_segments(&mut self, trkseg: &TrackSegment) {
+        let simplified = self.get_elevation_extremas(trkseg);
+
+        for i in 0..(simplified.len() - 1) {
+            let start = simplified[i];
+            let end = simplified[i + 1];
+            let last = i + 1 == simplified.len() - 1;
+
+            self.compute_smoothed_elevation_gain(trkseg, start, end, last);
+
+            let segment_dist =
+                self.local[end.flat].total_distance - self.local[start.flat].total_distance;
+            let segment_ele = trkseg[end].ele - trkseg[start].ele;
+            let segment_slope = slope(segment_ele, segment_dist);
+            for k in start.flat..(end.flat + last as usize) {
+                self.local[k].slope_segment = SlopeSegment {
+                    slope: segment_slope,
+                    distance: segment_dist,
+                };
+            }
+        }
+    }
+
+    fn compute_smoothed_elevation_gain(
+        &mut self,
+        trkseg: &TrackSegment,
+        start: TrackSegmentIndex,
+        end: TrackSegmentIndex,
+        last: bool,
+    ) {
+        let mut cumul_ele = 0.0;
+        let mut current_left = start;
+        let mut current_right = Some(start);
+        let mut prev_smoothed_ele = trkseg[start].ele;
+
+        for_each_window!(
+            trkseg,
+            Some(start),
+            Some(end),
+            0.1,
+            |i, j| self.local[j.flat].total_distance - self.local[i.flat].total_distance,
+            |i, left, right| {
+                while current_left != left {
+                    cumul_ele -= trkseg[current_left].ele;
+                    current_left = trkseg.next_index(Some(current_left)).unwrap();
+                }
+                while let Some(current) = current_right {
+                    if current > right {
+                        break;
+                    }
+                    cumul_ele += trkseg[current].ele;
+                    current_right = trkseg.next_index(current_right);
+                }
+
+                let smoothed_ele = if i == start || i == end {
+                    trkseg[i].ele
+                } else {
+                    cumul_ele / (right.flat - left.flat + 1) as f64
+                };
+
+                let delta = smoothed_ele - prev_smoothed_ele;
+                if delta > 0.0 {
+                    self.global.elevation_gain += delta;
+                } else if delta < 0.0 {
+                    self.global.elevation_loss -= delta;
+                }
+
+                if i < end || last {
+                    self.local[i.flat].elevation_gain = self.global.elevation_gain;
+                    self.local[i.flat].elevation_loss = self.global.elevation_loss;
+                }
+
+                prev_smoothed_ele = smoothed_ele;
+            },
+        );
+    }
+
+    fn compute_smoothed_slope(&mut self, trkseg: &TrackSegment) {
+        for_each_window!(
+            trkseg,
+            trkseg.first_index(),
+            trkseg.last_index(),
+            0.05,
+            |i, j| self.local[j.flat].total_distance - self.local[i.flat].total_distance,
+            |i, left, right| {
+                let dist =
+                    self.local[right.flat].total_distance - self.local[left.flat].total_distance;
+                let ele = trkseg[right].ele - trkseg[left].ele;
+                self.local[i.flat].slope = slope(ele, dist);
+            },
+        );
+    }
+
+    fn get_elevation_extremas(&self, trkseg: &TrackSegment) -> Vec<TrackSegmentIndex> {
+        ramer_douglas_peucker(
+            trkseg,
+            &|idx| {
+                (
+                    self.local[idx.flat].total_distance * 1000.0,
+                    trkseg[idx].ele,
+                )
+            },
+            20.0,
+        )
+    }
+}
+
+#[derive(Default, Debug)]
+pub struct GlobalStatistics {
+    pub total_distance: f64,
+    pub moving_distance: Option<f64>,
+    pub moving_time: Option<i32>,
+    pub elevation_gain: f64,
+    pub elevation_loss: f64,
+    pub start_time: Option<i64>,
+    pub end_time: Option<i64>,
+    pub bounds: LngLatBounds,
+}
+
+impl GlobalStatistics {
+    pub fn total_time(&self) -> Option<i32> {
+        time_diff(&self.start_time, &self.end_time)
+    }
+
+    pub fn total_speed(&self) -> Option<f64> {
+        self.total_time().map(|t| speed(self.total_distance, t))
+    }
+
+    pub fn moving_speed(&self) -> Option<f64> {
+        self.moving_distance
+            .zip(self.moving_time)
+            .map(|(d, t)| speed(d, t))
+    }
+
+    pub fn merge(&mut self, other: &GlobalStatistics) {
+        self.total_distance += other.total_distance;
+        self.moving_distance = sum_options(self.moving_distance, other.moving_distance);
+        self.moving_time = sum_options(self.moving_time, other.moving_time);
+        self.elevation_gain += other.elevation_gain;
+        self.elevation_loss += other.elevation_loss;
+        self.bounds.merge(&other.bounds);
+    }
+}
+
+#[derive(Default, Debug)]
+pub struct TrackpointStatistics {
+    pub total_distance: f64,
+    pub moving_distance: Option<f64>,
+    pub total_time: Option<i32>,
+    pub moving_time: Option<i32>,
+    pub speed: Option<f64>,
+    pub elevation_gain: f64,
+    pub elevation_loss: f64,
+    pub slope: f64,
+    pub slope_segment: SlopeSegment,
+}
+
+impl TrackpointStatistics {
+    fn from_partial_stats(stats: &Statistics) -> Self {
+        Self {
+            total_distance: stats.global.total_distance,
+            moving_distance: stats.global.moving_distance,
+            total_time: stats.total_time(),
+            moving_time: stats.global.moving_time,
+            // stats below are computed later
+            speed: None,
+            elevation_gain: Default::default(),
+            elevation_loss: Default::default(),
+            slope: Default::default(),
+            slope_segment: Default::default(),
+        }
+    }
+}
+
+#[derive(Default, Debug)]
+pub struct SlopeSegment {
+    pub slope: f64,
+    pub distance: f64,
+}
+
+#[cfg(test)]
+mod tests {
+    use std::{fs::File, io::Read};
+
+    use crate::io::parse;
+
+    use super::*;
+
+    #[test]
+    fn test_compute_smoothed_speed() {
+        let mut f = File::open("data/with_time.gpx").unwrap();
+        let mut data = String::new();
+        let _ = f.read_to_string(&mut data);
+        let gpx = parse(data.as_bytes()).unwrap();
+
+        let trkseg = &gpx.trk[0].trkseg[0];
+        let stats = Statistics::compute(trkseg);
+        assert_eq!(stats.local.len(), trkseg.len());
+        for trkpt_stats in stats.local.iter() {
+            assert!(trkpt_stats.speed.is_some());
+            let speed = trkpt_stats.speed.unwrap();
+            assert_ne!(speed, f64::NAN);
+            assert!((speed - 20.0).abs() < 0.1);
+        }
+    }
+
+    // TODO more tests
+}
@@ -0,0 +1,13 @@
+use std::ops::Add;
+
+pub fn sum_options<T>(a: Option<T>, b: Option<T>) -> Option<T>
+where
+    T: Add<Output = T>,
+{
+    match (a, b) {
+        (Some(a), Some(b)) => Some(a + b),
+        (Some(a), None) => Some(a),
+        (None, Some(b)) => Some(b),
+        (None, None) => None,
+    }
+}
@@ -0,0 +1,121 @@
+use std::f64::consts::PI;
+
+use crate::gpx::LngLat;
+
+static TO_RADIANS: f64 = PI / 180.0;
+static EARTH_RADIUS: f64 = 6371.0088;
+
+/// Computes the distance in kilometers between two coordinates using the Haversine formula
+pub fn distance(p1: LngLat, p2: LngLat) -> f64 {
+    let lat1 = p1.lat * TO_RADIANS;
+    let lat2 = p2.lat * TO_RADIANS;
+    let delta_lat = lat2 - lat1;
+    let delta_lng = (p2.lng - p1.lng) * TO_RADIANS;
+
+    let a =
+        (delta_lat / 2.0).sin().powi(2) + lat1.cos() * lat2.cos() * (delta_lng / 2.0).sin().powi(2);
+    let c = 2.0 * a.min(1.0).sqrt().asin();
+    EARTH_RADIUS * c
+}
+
+pub fn time_diff(a: &Option<i64>, b: &Option<i64>) -> Option<i32> {
+    match (a, b) {
+        (Some(t1), Some(t2)) => Some((t1 - t2) as i32),
+        _ => None,
+    }
+}
+
+/// Computes the speed for a given distance in kilometers and a time in milliseconds
+pub fn speed(distance: f64, time: i32) -> f64 {
+    distance / (time as f64 / 3600_000.0)
+}
+
+pub fn slope(ele: f64, distance: f64) -> f64 {
+    if distance == 0.0 {
+        100.0
+    } else {
+        0.1 * ele / distance
+    }
+}
+
+static METERS_PER_LATITUDE_DEGREE: f64 = 111320.0;
+
+fn get_meters_per_longitude_degree(latitude: f64) -> f64 {
+    ((latitude * PI) / 180.0).cos() * METERS_PER_LATITUDE_DEGREE
+}
+
+// Calculates the point on the line segment defined by p1 and p2
+// that is closest to the third point, p3.
+// Uses simple planar geometry (ignores earth curvature).
+fn projected(p1: LngLat, p2: LngLat, p3: LngLat) -> LngLat {
+    // Convert to meters using approximate scaling
+    let meters_per_longitude_degree = get_meters_per_longitude_degree(p1.lat);
+
+    let x1 = p1.lng * meters_per_longitude_degree;
+    let y1 = p1.lat * METERS_PER_LATITUDE_DEGREE;
+    let x2 = p2.lng * meters_per_longitude_degree;
+    let y2 = p2.lat * METERS_PER_LATITUDE_DEGREE;
+    let x3 = p3.lng * meters_per_longitude_degree;
+    let y3 = p3.lat * METERS_PER_LATITUDE_DEGREE;
+
+    let dx = x2 - x1;
+    let dy = y2 - y1;
+    let segment_length_squared = dx * dx + dy * dy;
+
+    if segment_length_squared == 0.0 {
+        // p1 and p2 are the same point
+        p1
+    } else {
+        // Project p3 onto the line defined by p1-p2
+        let t =
+            0.0_f64.max(1.0_f64.min(((x3 - x1) * dx + (y3 - y1) * dy) / segment_length_squared));
+
+        // Find the closest point on the segment
+        let proj_x = x1 + t * dx;
+        let proj_y = y1 + t * dy;
+
+        // Convert back to degrees
+        LngLat {
+            lng: proj_x / meters_per_longitude_degree,
+            lat: proj_y / METERS_PER_LATITUDE_DEGREE,
+        }
+    }
+}
+
+/// Calculates the perpendicular distance in meters
+/// between a line segment (defined by p1 and p2) and a third point, p3.
+/// Uses simple planar geometry (ignores earth curvature).
+fn crossarc_lnglat(p1: LngLat, p2: LngLat, p3: LngLat) -> f64 {
+    // Convert to meters using approximate scaling
+    let meters_per_longitude_degree = get_meters_per_longitude_degree(p1.lat);
+    crossarc(
+        p1.lng * meters_per_longitude_degree,
+        p1.lat * METERS_PER_LATITUDE_DEGREE,
+        p2.lng * meters_per_longitude_degree,
+        p2.lat * METERS_PER_LATITUDE_DEGREE,
+        p3.lng * meters_per_longitude_degree,
+        p3.lat * METERS_PER_LATITUDE_DEGREE,
+    )
+}
+
+pub fn crossarc(x1: f64, y1: f64, x2: f64, y2: f64, x3: f64, y3: f64) -> f64 {
+    let dx = x2 - x1;
+    let dy = y2 - y1;
+    let segment_length_squared = dx * dx + dy * dy;
+
+    if segment_length_squared == 0.0 {
+        // p1 and p2 are the same point
+        ((x3 - x1) * (x3 - x1) + (y3 - y1) * (y3 - y1)).sqrt()
+    } else {
+        // Project p3 onto the line defined by p1 - p2
+        let t =
+            0.0_f64.max(1.0_f64.min(((x3 - x1) * dx + (y3 - y1) * dy) / segment_length_squared));
+
+        // Find the closest point on the segment
+        let proj_x = x1 + t * dx;
+        let proj_y = y1 + t * dy;
+
+        // Return distance from p3 to the projected point
+        ((x3 - proj_x) * (x3 - proj_x) + (y3 - proj_y) * (y3 - proj_y)).sqrt()
+    }
+}
@@ -12,16 +12,20 @@
    "private": true,
    "dependencies": {
        "fast-xml-parser": "^4.5.0",
-        "immer": "^10.1.1",
-        "ts-node": "^10.9.2"
+        "immer": "^10.1.1"
    },
    "devDependencies": {
        "@types/geojson": "^7946.0.14",
        "@types/node": "^20.16.10",
+        "@typescript-eslint/parser": "^8.22.0",
+        "prettier": "^3.4.2",
+        "ts-node": "^10.9.2",
        "typescript": "^5.6.2"
    },
    "scripts": {
        "build": "tsc",
-        "postinstall": "npm run build"
+        "postinstall": "npm run build",
+        "lint": "prettier --check . --config ../.prettierrc && eslint .",
+        "format": "prettier --write . --config ../.prettierrc"
    }
 }
@@ -1,5 +1,5 @@
 export * from './gpx';
+export * from './statistics';
 export { Coordinates, LineStyleExtension, WaypointType } from './types';
 export { parseGPX, buildGPX } from './io';
 export * from './simplify';
-
@@ -1,25 +1,68 @@
-import { XMLParser, XMLBuilder } from "fast-xml-parser";
-import { GPXFileType } from "./types";
-import { GPXFile } from "./gpx";
+import { XMLParser, XMLBuilder } from 'fast-xml-parser';
+import { GPXFileType } from './types';
+import { GPXFile } from './gpx';
+
+const attributesWithNamespace = {
+    RoutePointExtension: 'gpxx:RoutePointExtension',
+    rpt: 'gpxx:rpt',
+    TrackPointExtension: 'gpxtpx:TrackPointExtension',
+    PowerExtension: 'gpxpx:PowerExtension',
+    atemp: 'gpxtpx:atemp',
+    hr: 'gpxtpx:hr',
+    cad: 'gpxtpx:cad',
+    Extensions: 'gpxtpx:Extensions',
+    PowerInWatts: 'gpxpx:PowerInWatts',
+    power: 'gpxpx:PowerExtension',
+    line: 'gpx_style:line',
+    color: 'gpx_style:color',
+    opacity: 'gpx_style:opacity',
+    width: 'gpx_style:width',
+};
+
+const floatPatterns = [
+    /[-+]?\d*\.\d+$/, // decimal
+    /[-+]?\d+$/, // integer
+];
+function safeParseFloat(value: string): number {
+    const parsed = parseFloat(value);
+    if (!isNaN(parsed)) {
+        return parsed;
+    }
+    for (const pattern of floatPatterns) {
+        const match = value.match(pattern);
+        if (match) {
+            return parseFloat(match[0]);
+        }
+    }
+    return 0.0;
+}

 export function parseGPX(gpxData: string): GPXFile {
    const parser = new XMLParser({
        ignoreAttributes: false,
-        attributeNamePrefix: "",
+        attributeNamePrefix: '',
        attributesGroupName: 'attributes',
+        removeNSPrefix: true,
        isArray(name: string) {
-            return name === 'trk' || name === 'trkseg' || name === 'trkpt' || name === 'wpt' || name === 'rte' || name === 'rtept' || name === 'gpxx:rpt';
+            return (
+                name === 'trk' ||
+                name === 'trkseg' ||
+                name === 'trkpt' ||
+                name === 'wpt' ||
+                name === 'rte' ||
+                name === 'rtept' ||
+                name === 'gpxx:rpt'
+            );
        },
        attributeValueProcessor(attrName, attrValue, jPath) {
            if (attrName === 'lat' || attrName === 'lon') {
-                return parseFloat(attrValue);
+                return safeParseFloat(attrValue);
            }
            return attrValue;
        },
        transformTagName(tagName: string) {
-            if (tagName === 'power') {
-                // Transform the simple <power> tag to the more complex <gpxpx:PowerExtension> tag, the nested <gpxpx:PowerInWatts> tag is then handled by the tagValueProcessor
-                return 'gpxpx:PowerExtension';
+            if (attributesWithNamespace[tagName]) {
+                return attributesWithNamespace[tagName];
            }
            return tagName;
        },
@@ -27,22 +70,29 @@ export function parseGPX(gpxData: string): GPXFile {
        tagValueProcessor(tagName, tagValue, jPath, hasAttributes, isLeafNode) {
            if (isLeafNode) {
                if (tagName === 'ele') {
-                    return parseFloat(tagValue);
+                    return safeParseFloat(tagValue);
                }

                if (tagName === 'time') {
                    return new Date(tagValue);
                }

-                if (tagName === 'gpxtpx:atemp' || tagName === 'gpxtpx:hr' || tagName === 'gpxtpx:cad' || tagName === 'gpxpx:PowerInWatts' || tagName === 'opacity' || tagName === 'weight') {
-                    return parseFloat(tagValue);
+                if (
+                    tagName === 'gpxtpx:atemp' ||
+                    tagName === 'gpxtpx:hr' ||
+                    tagName === 'gpxtpx:cad' ||
+                    tagName === 'gpxpx:PowerInWatts' ||
+                    tagName === 'gpx_style:opacity' ||
+                    tagName === 'gpx_style:width'
+                ) {
+                    return safeParseFloat(tagValue);
                }

                if (tagName === 'gpxpx:PowerExtension') {
                    // Finish the transformation of the simple <power> tag to the more complex <gpxpx:PowerExtension> tag
                    // Note that this only targets the transformed <power> tag, since it must be a leaf node
                    return {
-                        'gpxpx:PowerInWatts': parseFloat(tagValue)
+                        'gpxpx:PowerInWatts': safeParseFloat(tagValue),
                    };
                }
            }
@@ -54,7 +104,7 @@ export function parseGPX(gpxData: string): GPXFile {
    const parsed: GPXFileType = parser.parse(gpxData).gpx;

    // @ts-ignore
-    if (parsed.metadata === "") {
+    if (parsed.metadata === '') {
        parsed.metadata = {};
    }

@@ -64,25 +114,32 @@ export function parseGPX(gpxData: string): GPXFile {
 export function buildGPX(file: GPXFile, exclude: string[]): string {
    const gpx = file.toGPXFileType(exclude);

+    let lastDate = undefined;
    const builder = new XMLBuilder({
        format: true,
        ignoreAttributes: false,
-        attributeNamePrefix: "",
+        attributeNamePrefix: '',
        attributesGroupName: 'attributes',
        suppressEmptyNode: true,
-        tagValueProcessor: (tagName: string, tagValue: unknown): string => {
+        tagValueProcessor: (tagName: string, tagValue: unknown): string | undefined => {
            if (tagValue instanceof Date) {
+                if (isNaN(tagValue.getTime())) {
+                    return lastDate?.toISOString();
+                }
+                lastDate = tagValue;
                return tagValue.toISOString();
            }
            return tagValue.toString();
        },
    });

-    gpx.attributes.creator = gpx.attributes.creator ?? 'https://gpx.studio';
+    if (!gpx.attributes) gpx.attributes = {};
+    gpx.attributes['creator'] = gpx.attributes['creator'] ?? 'https://gpx.studio';
    gpx.attributes['version'] = '1.1';
    gpx.attributes['xmlns'] = 'http://www.topografix.com/GPX/1/1';
    gpx.attributes['xmlns:xsi'] = 'http://www.w3.org/2001/XMLSchema-instance';
-    gpx.attributes['xsi:schemaLocation'] = 'http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.garmin.com/xmlschemas/PowerExtension/v1 http://www.garmin.com/xmlschemas/PowerExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd';
+    gpx.attributes['xsi:schemaLocation'] =
+        'http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.garmin.com/xmlschemas/PowerExtension/v1 http://www.garmin.com/xmlschemas/PowerExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd';
    gpx.attributes['xmlns:gpxtpx'] = 'http://www.garmin.com/xmlschemas/TrackPointExtension/v1';
    gpx.attributes['xmlns:gpxx'] = 'http://www.garmin.com/xmlschemas/GpxExtensions/v3';
    gpx.attributes['xmlns:gpxpx'] = 'http://www.garmin.com/xmlschemas/PowerExtension/v1';
@@ -93,19 +150,24 @@ export function buildGPX(file: GPXFile, exclude: string[]): string {
    }

    return builder.build({
-        "?xml": {
+        '?xml': {
            attributes: {
-                version: "1.0",
-                encoding: "UTF-8",
-            }
+                version: '1.0',
+                encoding: 'UTF-8',
            },
-        gpx: removeEmptyElements(gpx)
+        },
+        gpx: removeEmptyElements(gpx),
    });
 }

 function removeEmptyElements(obj: GPXFileType): GPXFileType {
    for (const key in obj) {
-        if (obj[key] === null || obj[key] === undefined || obj[key] === '' || (Array.isArray(obj[key]) && obj[key].length === 0)) {
+        if (
+            obj[key] === null ||
+            obj[key] === undefined ||
+            obj[key] === '' ||
+            (Array.isArray(obj[key]) && obj[key].length === 0)
+        ) {
            delete obj[key];
        } else if (typeof obj[key] === 'object' && !(obj[key] instanceof Date)) {
            removeEmptyElements(obj[key]);
@@ -1,33 +1,46 @@
-import { TrackPoint } from "./gpx";
-import { Coordinates } from "./types";
+import { TrackPoint } from './gpx';
+import { Coordinates } from './types';

-export type SimplifiedTrackPoint = { point: TrackPoint, distance?: number };
+export type SimplifiedTrackPoint = { point: TrackPoint; distance?: number };

-const earthRadius = 6371008.8;
-
-export function ramerDouglasPeucker(points: TrackPoint[], epsilon: number = 50, measure: (a: TrackPoint, b: TrackPoint, c: TrackPoint) => number = crossarcDistance): SimplifiedTrackPoint[] {
+export function ramerDouglasPeucker(
+    points: TrackPoint[],
+    epsilon: number = 50,
+    measure: (a: TrackPoint, b: TrackPoint, c: TrackPoint) => number = crossarcDistance
+): SimplifiedTrackPoint[] {
    if (points.length == 0) {
        return [];
    } else if (points.length == 1) {
-        return [{
-            point: points[0]
-        }];
+        return [
+            {
+                point: points[0],
+            },
+        ];
    }

-    let simplified = [{
-        point: points[0]
-    }];
+    let simplified = [
+        {
+            point: points[0],
+        },
+    ];
    ramerDouglasPeuckerRecursive(points, epsilon, measure, 0, points.length - 1, simplified);
    simplified.push({
-        point: points[points.length - 1]
+        point: points[points.length - 1],
    });
    return simplified;
 }

-function ramerDouglasPeuckerRecursive(points: TrackPoint[], epsilon: number, measure: (a: TrackPoint, b: TrackPoint, c: TrackPoint) => number, start: number, end: number, simplified: SimplifiedTrackPoint[]) {
+function ramerDouglasPeuckerRecursive(
+    points: TrackPoint[],
+    epsilon: number,
+    measure: (a: TrackPoint, b: TrackPoint, c: TrackPoint) => number,
+    start: number,
+    end: number,
+    simplified: SimplifiedTrackPoint[]
+) {
    let largest = {
        index: 0,
-        distance: 0
+        distance: 0,
    };

    for (let i = start + 1; i < end; i++) {
@@ -45,111 +58,105 @@ function ramerDouglasPeuckerRecursive(points: TrackPoint[], epsilon: number, mea
    }
 }

-export function crossarcDistance(point1: TrackPoint, point2: TrackPoint, point3: TrackPoint | Coordinates): number {
-    return crossarc(point1.getCoordinates(), point2.getCoordinates(), point3 instanceof TrackPoint ? point3.getCoordinates() : point3);
+export function crossarcDistance(
+    point1: TrackPoint | Coordinates,
+    point2: TrackPoint | Coordinates,
+    point3: TrackPoint | Coordinates
+): number {
+    return crossarc(
+        point1 instanceof TrackPoint ? point1.getCoordinates() : point1,
+        point2 instanceof TrackPoint ? point2.getCoordinates() : point2,
+        point3 instanceof TrackPoint ? point3.getCoordinates() : point3
+    );
+}
+
+const metersPerLatitudeDegree = 111320;
+
+function getMetersPerLongitudeDegree(latitude: number): number {
+    return Math.cos((latitude * Math.PI) / 180) * metersPerLatitudeDegree;
 }

 function crossarc(coord1: Coordinates, coord2: Coordinates, coord3: Coordinates): number {
-    // Calculates the shortest distance in meters 
-    // between an arc (defined by p1 and p2) and a third point, p3.
-    // Input lat1,lon1,lat2,lon2,lat3,lon3 in degrees.
+    // Calculates the perpendicular distance in meters
+    // between a line segment (defined by p1 and p2) and a third point, p3.
+    // Uses simple planar geometry (ignores earth curvature).

-    const rad = Math.PI / 180;
-    const lat1 = coord1.lat * rad;
-    const lat2 = coord2.lat * rad;
-    const lat3 = coord3.lat * rad;
+    // Convert to meters using approximate scaling
+    const metersPerLongitudeDegree = getMetersPerLongitudeDegree(coord1.lat);

-    const lon1 = coord1.lon * rad;
-    const lon2 = coord2.lon * rad;
-    const lon3 = coord3.lon * rad;
+    const x1 = coord1.lon * metersPerLongitudeDegree;
+    const y1 = coord1.lat * metersPerLatitudeDegree;
+    const x2 = coord2.lon * metersPerLongitudeDegree;
+    const y2 = coord2.lat * metersPerLatitudeDegree;
+    const x3 = coord3.lon * metersPerLongitudeDegree;
+    const y3 = coord3.lat * metersPerLatitudeDegree;

-    // Prerequisites for the formulas
-    const bear12 = bearing(lat1, lon1, lat2, lon2);
-    const bear13 = bearing(lat1, lon1, lat3, lon3);
-    let dis13 = distance(lat1, lon1, lat3, lon3);
+    const dx = x2 - x1;
+    const dy = y2 - y1;
+    const segmentLengthSquared = dx * dx + dy * dy;

-    let diff = Math.abs(bear13 - bear12);
-    if (diff > Math.PI) {
-        diff = 2 * Math.PI - diff;
+    if (segmentLengthSquared === 0) {
+        // p1 and p2 are the same point
+        return Math.sqrt((x3 - x1) * (x3 - x1) + (y3 - y1) * (y3 - y1));
    }

-    // Is relative bearing obtuse?
-    if (diff > (Math.PI / 2)) {
-        return dis13;
-    }
+    // Project p3 onto the line defined by p1-p2
+    const t = Math.max(0, Math.min(1, ((x3 - x1) * dx + (y3 - y1) * dy) / segmentLengthSquared));

-    // Find the cross-track distance.
-    let dxt = Math.asin(Math.sin(dis13 / earthRadius) * Math.sin(bear13 - bear12)) * earthRadius;
+    // Find the closest point on the segment
+    const projX = x1 + t * dx;
+    const projY = y1 + t * dy;

-    // Is p4 beyond the arc?
-    let dis12 = distance(lat1, lon1, lat2, lon2);
-    let dis14 = Math.acos(Math.cos(dis13 / earthRadius) / Math.cos(dxt / earthRadius)) * earthRadius;
-    if (dis14 > dis12) {
-        return distance(lat2, lon2, lat3, lon3);
-    } else {
-        return Math.abs(dxt);
-    }
+    // Return distance from p3 to the projected point
+    return Math.sqrt((x3 - projX) * (x3 - projX) + (y3 - projY) * (y3 - projY));
 }

-function distance(latA: number, lonA: number, latB: number, lonB: number): number {
-    // Finds the distance between two lat / lon points.
-    return Math.acos(Math.sin(latA) * Math.sin(latB) + Math.cos(latA) * Math.cos(latB) * Math.cos(lonB - lonA)) * earthRadius;
-}
-
-
-function bearing(latA: number, lonA: number, latB: number, lonB: number): number {
-    // Finds the bearing from one lat / lon point to another.
-    return Math.atan2(Math.sin(lonB - lonA) * Math.cos(latB),
-        Math.cos(latA) * Math.sin(latB) - Math.sin(latA) * Math.cos(latB) * Math.cos(lonB - lonA));
-}
-
-export function projectedPoint(point1: TrackPoint, point2: TrackPoint, point3: TrackPoint | Coordinates): Coordinates {
-    return projected(point1.getCoordinates(), point2.getCoordinates(), point3 instanceof TrackPoint ? point3.getCoordinates() : point3);
+export function projectedPoint(
+    point1: TrackPoint,
+    point2: TrackPoint,
+    point3: TrackPoint | Coordinates
+): Coordinates {
+    return projected(
+        point1.getCoordinates(),
+        point2.getCoordinates(),
+        point3 instanceof TrackPoint ? point3.getCoordinates() : point3
+    );
 }

 function projected(coord1: Coordinates, coord2: Coordinates, coord3: Coordinates): Coordinates {
-    // Calculates the point on the line defined by p1 and p2
+    // Calculates the point on the line segment defined by p1 and p2
    // that is closest to the third point, p3.
-    // Input lat1,lon1,lat2,lon2,lat3,lon3 in degrees.
+    // Uses simple planar geometry (ignores earth curvature).

-    const rad = Math.PI / 180;
-    const lat1 = coord1.lat * rad;
-    const lat2 = coord2.lat * rad;
-    const lat3 = coord3.lat * rad;
+    // Convert to meters using approximate scaling
+    const metersPerLongitudeDegree = getMetersPerLongitudeDegree(coord1.lat);

-    const lon1 = coord1.lon * rad;
-    const lon2 = coord2.lon * rad;
-    const lon3 = coord3.lon * rad;
+    const x1 = coord1.lon * metersPerLongitudeDegree;
+    const y1 = coord1.lat * metersPerLatitudeDegree;
+    const x2 = coord2.lon * metersPerLongitudeDegree;
+    const y2 = coord2.lat * metersPerLatitudeDegree;
+    const x3 = coord3.lon * metersPerLongitudeDegree;
+    const y3 = coord3.lat * metersPerLatitudeDegree;

-    // Prerequisites for the formulas
-    const bear12 = bearing(lat1, lon1, lat2, lon2);
-    const bear13 = bearing(lat1, lon1, lat3, lon3);
-    let dis13 = distance(lat1, lon1, lat3, lon3);
+    const dx = x2 - x1;
+    const dy = y2 - y1;
+    const segmentLengthSquared = dx * dx + dy * dy;

-    let diff = Math.abs(bear13 - bear12);
-    if (diff > Math.PI) {
-        diff = 2 * Math.PI - diff;
-    }
-
-    // Is relative bearing obtuse?
-    if (diff > (Math.PI / 2)) {
+    if (segmentLengthSquared === 0) {
+        // p1 and p2 are the same point
        return coord1;
    }

-    // Find the cross-track distance.
-    let dxt = Math.asin(Math.sin(dis13 / earthRadius) * Math.sin(bear13 - bear12)) * earthRadius;
+    // Project p3 onto the line defined by p1-p2
+    const t = Math.max(0, Math.min(1, ((x3 - x1) * dx + (y3 - y1) * dy) / segmentLengthSquared));

-    // Is p4 beyond the arc?
-    let dis12 = distance(lat1, lon1, lat2, lon2);
-    let dis14 = Math.acos(Math.cos(dis13 / earthRadius) / Math.cos(dxt / earthRadius)) * earthRadius;
-    if (dis14 > dis12) {
-        return coord2;
-    } else {
-        // Determine the closest point (p4) on the great circle
-        const f = dis14 / earthRadius;
-        const lat4 = Math.asin(Math.sin(lat1) * Math.cos(f) + Math.cos(lat1) * Math.sin(f) * Math.cos(bear12));
-        const lon4 = lon1 + Math.atan2(Math.sin(bear12) * Math.sin(f) * Math.cos(lat1), Math.cos(f) - Math.sin(lat1) * Math.sin(lat4));
+    // Find the closest point on the segment
+    const projX = x1 + t * dx;
+    const projY = y1 + t * dy;

-        return { lat: lat4 / rad, lon: lon4 / rad };
-    }
+    // Convert back to degrees
+    return {
+        lat: projY / metersPerLatitudeDegree,
+        lon: projX / metersPerLongitudeDegree,
+    };
 }
@@ -0,0 +1,391 @@
+import { TrackPoint } from './gpx';
+import { Coordinates } from './types';
+
+export class GPXGlobalStatistics {
+    length: number;
+    distance: {
+        moving: number;
+        total: number;
+    };
+    time: {
+        start: Date | undefined;
+        end: Date | undefined;
+        moving: number;
+        total: number;
+    };
+    speed: {
+        moving: number;
+        total: number;
+    };
+    elevation: {
+        gain: number;
+        loss: number;
+    };
+    bounds: {
+        southWest: Coordinates;
+        northEast: Coordinates;
+    };
+    atemp: {
+        avg: number;
+        count: number;
+    };
+    hr: {
+        avg: number;
+        count: number;
+    };
+    cad: {
+        avg: number;
+        count: number;
+    };
+    power: {
+        avg: number;
+        count: number;
+    };
+    extensions: Record<string, Record<string, number>>;
+
+    constructor() {
+        this.length = 0;
+        this.distance = {
+            moving: 0,
+            total: 0,
+        };
+        this.time = {
+            start: undefined,
+            end: undefined,
+            moving: 0,
+            total: 0,
+        };
+        this.speed = {
+            moving: 0,
+            total: 0,
+        };
+        this.elevation = {
+            gain: 0,
+            loss: 0,
+        };
+        this.bounds = {
+            southWest: {
+                lat: 90,
+                lon: 180,
+            },
+            northEast: {
+                lat: -90,
+                lon: -180,
+            },
+        };
+        this.atemp = {
+            avg: 0,
+            count: 0,
+        };
+        this.hr = {
+            avg: 0,
+            count: 0,
+        };
+        this.cad = {
+            avg: 0,
+            count: 0,
+        };
+        this.power = {
+            avg: 0,
+            count: 0,
+        };
+        this.extensions = {};
+    }
+
+    mergeWith(other: GPXGlobalStatistics): void {
+        this.length += other.length;
+
+        this.distance.total += other.distance.total;
+        this.distance.moving += other.distance.moving;
+
+        this.time.start =
+            this.time.start !== undefined && other.time.start !== undefined
+                ? new Date(Math.min(this.time.start.getTime(), other.time.start.getTime()))
+                : (this.time.start ?? other.time.start);
+        this.time.end =
+            this.time.end !== undefined && other.time.end !== undefined
+                ? new Date(Math.max(this.time.end.getTime(), other.time.end.getTime()))
+                : (this.time.end ?? other.time.end);
+
+        this.time.total += other.time.total;
+        this.time.moving += other.time.moving;
+
+        this.speed.moving =
+            this.time.moving > 0 ? this.distance.moving / (this.time.moving / 3600) : 0;
+        this.speed.total = this.time.total > 0 ? this.distance.total / (this.time.total / 3600) : 0;
+
+        this.elevation.gain += other.elevation.gain;
+        this.elevation.loss += other.elevation.loss;
+
+        this.bounds.southWest.lat = Math.min(this.bounds.southWest.lat, other.bounds.southWest.lat);
+        this.bounds.southWest.lon = Math.min(this.bounds.southWest.lon, other.bounds.southWest.lon);
+        this.bounds.northEast.lat = Math.max(this.bounds.northEast.lat, other.bounds.northEast.lat);
+        this.bounds.northEast.lon = Math.max(this.bounds.northEast.lon, other.bounds.northEast.lon);
+
+        this.atemp.avg =
+            (this.atemp.count * this.atemp.avg + other.atemp.count * other.atemp.avg) /
+            Math.max(1, this.atemp.count + other.atemp.count);
+        this.atemp.count += other.atemp.count;
+        this.hr.avg =
+            (this.hr.count * this.hr.avg + other.hr.count * other.hr.avg) /
+            Math.max(1, this.hr.count + other.hr.count);
+        this.hr.count += other.hr.count;
+        this.cad.avg =
+            (this.cad.count * this.cad.avg + other.cad.count * other.cad.avg) /
+            Math.max(1, this.cad.count + other.cad.count);
+        this.cad.count += other.cad.count;
+        this.power.avg =
+            (this.power.count * this.power.avg + other.power.count * other.power.avg) /
+            Math.max(1, this.power.count + other.power.count);
+        this.power.count += other.power.count;
+
+        Object.keys(other.extensions).forEach((extension) => {
+            if (this.extensions[extension] === undefined) {
+                this.extensions[extension] = {};
+            }
+            Object.keys(other.extensions[extension]).forEach((value) => {
+                if (this.extensions[extension][value] === undefined) {
+                    this.extensions[extension][value] = 0;
+                }
+                this.extensions[extension][value] += other.extensions[extension][value];
+            });
+        });
+    }
+}
+
+export class TrackPointLocalStatistics {
+    distance: {
+        moving: number;
+        total: number;
+    };
+    time: {
+        moving: number;
+        total: number;
+    };
+    speed: number;
+    elevation: {
+        gain: number;
+        loss: number;
+    };
+    slope: {
+        at: number;
+        segment: number;
+        length: number;
+    };
+
+    constructor() {
+        this.distance = {
+            moving: 0,
+            total: 0,
+        };
+        this.time = {
+            moving: 0,
+            total: 0,
+        };
+        this.speed = 0;
+        this.elevation = {
+            gain: 0,
+            loss: 0,
+        };
+        this.slope = {
+            at: 0,
+            segment: 0,
+            length: 0,
+        };
+    }
+}
+
+export class GPXLocalStatistics {
+    points: TrackPoint[];
+    data: TrackPointLocalStatistics[];
+
+    constructor() {
+        this.points = [];
+        this.data = [];
+    }
+}
+
+export type TrackPointWithLocalStatistics = {
+    trkpt: TrackPoint;
+} & TrackPointLocalStatistics;
+
+export class GPXStatistics {
+    global: GPXGlobalStatistics;
+    local: GPXLocalStatistics;
+
+    constructor() {
+        this.global = new GPXGlobalStatistics();
+        this.local = new GPXLocalStatistics();
+    }
+
+    sliced(start: number, end: number): GPXGlobalStatistics {
+        if (start < 0) {
+            start = 0;
+        } else if (start >= this.global.length) {
+            return new GPXGlobalStatistics();
+        }
+
+        if (end < start) {
+            return new GPXGlobalStatistics();
+        } else if (end >= this.global.length) {
+            end = this.global.length - 1;
+        }
+
+        if (start === 0 && end === this.global.length - 1) {
+            return this.global;
+        }
+
+        let statistics = new GPXGlobalStatistics();
+
+        statistics.length = end - start + 1;
+
+        statistics.distance.total =
+            this.local.data[end].distance.total - this.local.data[start].distance.total;
+        statistics.distance.moving =
+            this.local.data[end].distance.moving - this.local.data[start].distance.moving;
+
+        statistics.time.start = this.local.points[start].time;
+        statistics.time.end = this.local.points[end].time;
+
+        statistics.time.total = this.local.data[end].time.total - this.local.data[start].time.total;
+        statistics.time.moving =
+            this.local.data[end].time.moving - this.local.data[start].time.moving;
+
+        statistics.speed.moving =
+            statistics.time.moving > 0
+                ? statistics.distance.moving / (statistics.time.moving / 3600)
+                : 0;
+        statistics.speed.total =
+            statistics.time.total > 0
+                ? statistics.distance.total / (statistics.time.total / 3600)
+                : 0;
+
+        statistics.elevation.gain =
+            this.local.data[end].elevation.gain - this.local.data[start].elevation.gain;
+        statistics.elevation.loss =
+            this.local.data[end].elevation.loss - this.local.data[start].elevation.loss;
+
+        statistics.bounds.southWest.lat = this.global.bounds.southWest.lat;
+        statistics.bounds.southWest.lon = this.global.bounds.southWest.lon;
+        statistics.bounds.northEast.lat = this.global.bounds.northEast.lat;
+        statistics.bounds.northEast.lon = this.global.bounds.northEast.lon;
+
+        statistics.atemp = this.global.atemp;
+        statistics.hr = this.global.hr;
+        statistics.cad = this.global.cad;
+        statistics.power = this.global.power;
+
+        return statistics;
+    }
+}
+
+export class GPXStatisticsGroup {
+    private _statistics: GPXStatistics[];
+    private _cumulative: GPXGlobalStatistics[];
+    private _slice: [number, number] | null = null;
+    global: GPXGlobalStatistics;
+
+    constructor() {
+        this._statistics = [];
+        this._cumulative = [new GPXGlobalStatistics()];
+        this.global = new GPXGlobalStatistics();
+    }
+
+    add(statistics: GPXStatistics | GPXStatisticsGroup): void {
+        if (statistics instanceof GPXStatisticsGroup) {
+            statistics._statistics.forEach((stats) => this._add(stats));
+        } else {
+            this._add(statistics);
+        }
+    }
+
+    _add(statistics: GPXStatistics): void {
+        this._statistics.push(statistics);
+        const cumulative = new GPXGlobalStatistics();
+        cumulative.mergeWith(this._cumulative[this._cumulative.length - 1]);
+        cumulative.mergeWith(statistics.global);
+        this._cumulative.push(cumulative);
+        this.global.mergeWith(statistics.global);
+    }
+
+    sliced(start: number, end: number): GPXGlobalStatistics {
+        let sliced = new GPXGlobalStatistics();
+        for (let i = 0; i < this._statistics.length; i++) {
+            const statistics = this._statistics[i];
+            const cumulative = this._cumulative[i];
+            if (start < cumulative.length + statistics.global.length && end >= cumulative.length) {
+                const localStart = Math.max(0, start - cumulative.length);
+                const localEnd = Math.min(statistics.global.length - 1, end - cumulative.length);
+                sliced.mergeWith(statistics.sliced(localStart, localEnd));
+            }
+        }
+        return sliced;
+    }
+
+    getTrackPoint(index: number): TrackPointWithLocalStatistics | undefined {
+        if (this._slice !== null) {
+            index += this._slice[0];
+        }
+        for (let i = 0; i < this._statistics.length; i++) {
+            const statistics = this._statistics[i];
+            const cumulative = this._cumulative[i];
+            if (index < cumulative.length + statistics.global.length) {
+                return this._getTrackPoint(cumulative, statistics, index - cumulative.length);
+            }
+        }
+        return undefined;
+    }
+
+    _getTrackPoint(
+        cumulative: GPXGlobalStatistics,
+        statistics: GPXStatistics,
+        index: number
+    ): TrackPointWithLocalStatistics {
+        const point = statistics.local.points[index];
+        return {
+            trkpt: point,
+            distance: {
+                moving: statistics.local.data[index].distance.moving + cumulative.distance.moving,
+                total: statistics.local.data[index].distance.total + cumulative.distance.total,
+            },
+            time: {
+                moving: statistics.local.data[index].time.moving + cumulative.time.moving,
+                total: statistics.local.data[index].time.total + cumulative.time.total,
+            },
+            speed: statistics.local.data[index].speed,
+            elevation: {
+                gain: statistics.local.data[index].elevation.gain + cumulative.elevation.gain,
+                loss: statistics.local.data[index].elevation.loss + cumulative.elevation.loss,
+            },
+            slope: {
+                at: statistics.local.data[index].slope.at,
+                segment: statistics.local.data[index].slope.segment,
+                length: statistics.local.data[index].slope.length,
+            },
+        };
+    }
+
+    forEachTrackPoint(
+        callback: (
+            point: TrackPoint,
+            distance: number,
+            speed: number,
+            slope: { at: number; segment: number; length: number },
+            index: number
+        ) => void
+    ): void {
+        for (let i = 0; i < this._statistics.length; i++) {
+            const statistics = this._statistics[i];
+            const cumulative = this._cumulative[i];
+            statistics.local.points.forEach((point, index) =>
+                callback(
+                    point,
+                    cumulative.distance.total + statistics.local.data[index].distance.total,
+                    statistics.local.data[index].speed,
+                    statistics.local.data[index].slope,
+                    cumulative.length + index
+                )
+            );
+        }
+    }
+}
@@ -67,9 +67,9 @@ export type TrackExtensions = {
 };

 export type LineStyleExtension = {
-    color?: string;
-    opacity?: number;
-    weight?: number;
+    'gpx_style:color'?: string;
+    'gpx_style:opacity'?: number;
+    'gpx_style:width'?: number;
 };

 export type TrackSegmentType = {
@@ -92,14 +92,12 @@ export type TrackPointExtension = {
    'gpxtpx:atemp'?: number;
    'gpxtpx:hr'?: number;
    'gpxtpx:cad'?: number;
-    'gpxtpx:Extensions'?: {
-        surface?: string;
-    };
-}
+    'gpxtpx:Extensions'?: Record<string, string>;
+};

 export type PowerExtension = {
    'gpxpx:PowerInWatts'?: number;
-}
+};

 export type Author = {
    name?: string;
@@ -116,12 +114,12 @@ export type RouteType = {
    type?: string;
    extensions?: TrackExtensions;
    rtept: WaypointType[];
-}
+};

 export type RoutePointExtension = {
    'gpxx:rpt'?: GPXXRoutePoint[];
-}
+};

 export type GPXXRoutePoint = {
    attributes: Coordinates;
-}
+};
@@ -16,9 +16,9 @@
        <type>Cycling</type>
        <extensions>
            <gpx_style:line>
-                <color>#2d3ee9</color>
-                <opacity>0.5</opacity>
-                <weight>6</weight>
+                <gpx_style:color>2d3ee9</gpx_style:color>
+                <gpx_style:opacity>0.5</gpx_style:opacity>
+                <gpx_style:width>6</gpx_style:width>
            </gpx_style:line>
        </extensions>
        <trkseg>
@@ -4,9 +4,7 @@
        "target": "ES2015",
        "declaration": true,
        "outDir": "./dist",
-        "moduleResolution": "node",
+        "moduleResolution": "node"
    },
-    "include": [
-        "src"
-    ],
+    "include": ["src"]
 }
@@ -1 +1 @@
-PUBLIC_MAPBOX_TOKEN=YOUR_MAPBOX_TOKEN
+PUBLIC_MAPTILER_KEY=YOUR_MAPTILER_KEY
@@ -5,27 +5,27 @@ module.exports = {
        'eslint:recommended',
        'plugin:@typescript-eslint/recommended',
        'plugin:svelte/recommended',
-		'prettier'
+        'prettier',
    ],
    parser: '@typescript-eslint/parser',
    plugins: ['@typescript-eslint'],
    parserOptions: {
        sourceType: 'module',
        ecmaVersion: 2020,
-		extraFileExtensions: ['.svelte']
+        extraFileExtensions: ['.svelte'],
    },
    env: {
        browser: true,
        es2017: true,
-		node: true
+        node: true,
    },
    overrides: [
        {
            files: ['*.svelte'],
            parser: 'svelte-eslint-parser',
            parserOptions: {
-				parser: '@typescript-eslint/parser'
-			}
-		}
-	]
+                parser: '@typescript-eslint/parser',
+            },
+        },
+    ],
 };
@@ -8,3 +8,5 @@ node_modules
 !.env.example
 vite.config.js.timestamp-*
 vite.config.ts.timestamp-*
+static/*.webmanifest
+!static/en.manifest.webmanifest
@@ -1,4 +0,0 @@
-# Ignore files for PNPM, NPM and YARN
-pnpm-lock.yaml
-package-lock.json
-yarn.lock
@@ -1,8 +0,0 @@
-{
-	"useTabs": true,
-	"singleQuote": true,
-	"trailingComma": "none",
-	"printWidth": 100,
-	"plugins": ["prettier-plugin-svelte"],
-	"overrides": [{ "files": "*.svelte", "options": { "parser": "svelte" } }]
-}
@@ -1,14 +1,20 @@
 {
 	"$schema": "https://shadcn-svelte.com/schema.json",
-	"style": "default",
 	"tailwind": {
-		"config": "tailwind.config.js",
 		"css": "src/app.css",
-		"baseColor": "slate"
+		"baseColor": "neutral"
 	},
 	"aliases": {
 		"components": "$lib/components",
-		"utils": "$lib/utils"
+		"utils": "$lib/utils",
+		"ui": "$lib/components/ui",
+		"hooks": "$lib/hooks",
+		"lib": "$lib"
 	},
-	"typescript": true
+	"typescript": true,
+	"registry": "https://shadcn-svelte.com/registry",
+	"style": "nova",
+	"iconLibrary": "lucide",
+	"menuColor": "default",
+	"menuAccent": "subtle"
 }
@@ -5,75 +5,80 @@
    "scripts": {
        "dev": "vite dev",
        "build": "vite build",
-        "postbuild": "npx tsx src/lib/sitemap.ts",
+        "prebuild": "npx tsx src/lib/scripts/pwa-manifest.ts",
+        "postbuild": "npx tsx src/lib/scripts/sitemap.ts",
        "preview": "vite preview",
        "check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
        "check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
-        "lint": "prettier --check . && eslint .",
-        "format": "prettier --write ."
+        "lint": "prettier --check . --config ../.prettierrc --ignore-path ../.prettierignore --ignore-path ./.gitignore && eslint .",
+        "format": "prettier --write . --config ../.prettierrc --ignore-path ../.prettierignore --ignore-path ./.gitignore"
    },
    "devDependencies": {
-        "@sveltejs/adapter-auto": "^3.2.5",
-        "@sveltejs/adapter-static": "^3.0.5",
-        "@sveltejs/enhanced-img": "^0.3.8",
-        "@sveltejs/kit": "^2.6.1",
-        "@sveltejs/vite-plugin-svelte": "^3.1.2",
-        "@types/eslint": "^8.56.12",
+        "@fontsource-variable/inter": "^5.2.8",
+        "@internationalized/date": "^3.12.0",
+        "@lucide/svelte": "^1.7.0",
+        "@sveltejs/adapter-static": "^3.0.8",
+        "@sveltejs/enhanced-img": "^0.6.0",
+        "@sveltejs/kit": "^2.21.2",
+        "@sveltejs/vite-plugin-svelte": "^5.1.0",
+        "@tailwindcss/vite": "^4.1.8",
+        "@types/eslint": "^9.6.1",
        "@types/events": "^3.0.3",
-        "@types/mapbox__mapbox-gl-geocoder": "^5.0.0",
+        "@types/file-saver": "^2.0.7",
+        "@types/mapbox__sphericalmercator": "^1.2.3",
        "@types/mapbox__tilebelt": "^1.0.4",
-        "@types/mapbox-gl": "^3.4.0",
-        "@types/node": "^20.16.10",
-        "@types/png.js": "^0.2.3",
-        "@types/sanitize-html": "^2.13.0",
+        "@types/node": "^22.15.30",
+        "@types/sanitize-html": "^2.16.0",
        "@types/sortablejs": "^1.15.8",
-        "@typescript-eslint/eslint-plugin": "^7.18.0",
-        "@typescript-eslint/parser": "^7.18.0",
-        "autoprefixer": "^10.4.20",
-        "eslint": "^8.57.1",
-        "eslint-config-prettier": "^9.1.0",
-        "eslint-plugin-svelte": "^2.44.1",
+        "@typescript-eslint/eslint-plugin": "^8.33.1",
+        "@typescript-eslint/parser": "^8.33.1",
+        "bits-ui": "^2.17.2",
+        "clsx": "^2.1.1",
+        "eslint": "^9.28.0",
+        "eslint-config-prettier": "^10.1.5",
+        "eslint-plugin-svelte": "^3.9.1",
        "events": "^3.3.0",
-        "glob": "^10.4.5",
-        "mdsvex": "^0.11.2",
+        "glob": "^11.0.2",
+        "lucide-static": "^0.513.0",
+        "mdsvex": "^0.12.6",
+        "mode-watcher": "^1.1.0",
+        "paneforge": "^1.0.0-next.5",
        "postcss": "^8.4.47",
-        "prettier": "^3.3.3",
-        "prettier-plugin-svelte": "^3.2.7",
-        "svelte": "^4.2.19",
-        "svelte-check": "^3.8.6",
-        "tailwindcss": "^3.4.13",
-        "tslib": "^2.7.0",
+        "prettier": "^3.5.3",
+        "prettier-plugin-svelte": "^3.4.0",
+        "shadcn-svelte": "^1.2.7",
+        "svelte": "^5.33.18",
+        "svelte-check": "^4.0.0",
+        "svelte-dnd-action": "^0.9.65",
+        "svelte-sonner": "^1.1.0",
+        "tailwind-merge": "^3.5.0",
+        "tailwind-variants": "^3.2.2",
+        "tailwindcss": "^4.1.8",
+        "tslib": "^2.8.1",
        "tsx": "^4.19.1",
-        "typescript": "^5.6.2",
-        "vite": "^5.4.8",
-        "vite-plugin-node-polyfills": "^0.22.0"
+        "tw-animate-css": "^1.4.0",
+        "typescript": "^5.8.3",
+        "vaul-svelte": "^1.0.0-next.7",
+        "vite": "^6.3.5",
+        "vite-plugin-wasm": "^3.6.0"
    },
    "type": "module",
    "dependencies": {
-        "@docsearch/js": "^3.6.2",
-        "@internationalized/date": "^3.5.5",
-        "@mapbox/mapbox-gl-geocoder": "^5.0.3",
-        "@mapbox/sphericalmercator": "^1.2.0",
-        "@mapbox/tilebelt": "^1.0.2",
-        "@types/mapbox__sphericalmercator": "^1.2.3",
-        "bits-ui": "^0.21.15",
-        "chart.js": "^4.4.4",
-        "chartjs-plugin-zoom": "^2.0.1",
-        "clsx": "^2.1.1",
-        "dexie": "^4.0.8",
+        "@docsearch/js": "^3.9.0",
+        "@mapbox/sphericalmercator": "^2.0.1",
+        "@mapbox/tilebelt": "^2.0.2",
+        "@maplibre/maplibre-gl-geocoder": "^1.9.4",
+        "chart.js": "^4.5.1",
+        "chartjs-plugin-zoom": "^2.2.0",
+        "dexie": "^4.0.11",
+        "file-saver": "^2.0.5",
        "gpx": "file:../gpx",
+        "gpx-rs": "file:../gpx-rs/pkg",
        "immer": "^10.1.1",
-        "lucide-static": "^0.427.0",
-        "lucide-svelte": "^0.427.0",
-        "mapbox-gl": "^3.7.0",
+        "jszip": "^3.10.1",
        "mapillary-js": "^4.1.2",
-        "mode-watcher": "^0.3.1",
-        "png.js": "^0.2.1",
-        "sanitize-html": "^2.13.0",
-        "sortablejs": "^1.15.3",
-        "svelte-i18n": "^4.0.0",
-        "svelte-sonner": "^0.3.28",
-        "tailwind-merge": "^2.5.2",
-        "tailwind-variants": "^0.2.1"
+        "maplibre-gl": "^5.21.1",
+        "sanitize-html": "^2.17.0",
+        "sortablejs": "^1.15.6"
    }
 }
@@ -1,6 +0,0 @@
-export default {
-  plugins: {
-    tailwindcss: {},
-    autoprefixer: {},
-  },
-}
@@ -0,0 +1,164 @@
+@import 'tailwindcss';
+@import 'tw-animate-css';
+@import "shadcn-svelte/tailwind.css";
+@import "@fontsource-variable/inter";
+
+@custom-variant dark (&:is(.dark *));
+
+:root {
+    --background: oklch(1 0 0);
+    --foreground: oklch(0.145 0 0);
+    --muted: oklch(0.97 0 0);
+    --muted-foreground: oklch(0.556 0 0);
+    --popover: oklch(1 0 0);
+    --popover-foreground: oklch(0.145 0 0);
+    --card: oklch(1 0 0);
+    --card-foreground: oklch(0.145 0 0);
+    --border: oklch(0.922 0 0);
+    --input: oklch(0.922 0 0);
+    --primary: oklch(0.205 0 0);
+    --primary-foreground: oklch(0.985 0 0);
+    --secondary: oklch(0.97 0 0);
+    --secondary-foreground: oklch(0.205 0 0);
+    --accent: oklch(0.97 0 0);
+    --accent-foreground: oklch(0.205 0 0);
+    --destructive: oklch(0.577 0.245 27.325);
+    --destructive-foreground: hsl(0 0% 98%);
+    --ring: oklch(0.708 0 0);
+    --sidebar: oklch(0.985 0 0);
+    --sidebar-foreground: oklch(0.145 0 0);
+    --sidebar-primary: oklch(0.205 0 0);
+    --sidebar-primary-foreground: oklch(0.985 0 0);
+    --sidebar-accent: oklch(0.97 0 0);
+    --sidebar-accent-foreground: oklch(0.205 0 0);
+    --sidebar-border: oklch(0.922 0 0);
+    --sidebar-ring: oklch(0.708 0 0);
+
+    --support: rgb(220 15 130);
+    --link: rgb(0 110 180);
+    --selection: hsl(240 4.8% 93%);
+
+    --radius: 0.5rem;
+
+    --chart-1: oklch(0.87 0 0);
+
+    --chart-2: oklch(0.556 0 0);
+
+    --chart-3: oklch(0.439 0 0);
+
+    --chart-4: oklch(0.371 0 0);
+
+    --chart-5: oklch(0.269 0 0);
+}
+
+.dark {
+    --background: oklch(0.145 0 0);
+    --foreground: oklch(0.985 0 0);
+    --muted: oklch(0.269 0 0);
+    --muted-foreground: oklch(0.708 0 0);
+    --popover: oklch(0.205 0 0);
+    --popover-foreground: oklch(0.985 0 0);
+    --card: oklch(0.205 0 0);
+    --card-foreground: oklch(0.985 0 0);
+    --border: oklch(1 0 0 / 10%);
+    --input: oklch(1 0 0 / 15%);
+    --primary: oklch(0.922 0 0);
+    --primary-foreground: oklch(0.205 0 0);
+    --secondary: oklch(0.269 0 0);
+    --secondary-foreground: oklch(0.985 0 0);
+    --accent: oklch(0.269 0 0);
+    --accent-foreground: oklch(0.985 0 0);
+    --destructive: oklch(0.704 0.191 22.216);
+    --destructive-foreground: hsl(0 0% 98%);
+    --ring: oklch(0.556 0 0);
+    --sidebar: oklch(0.205 0 0);
+    --sidebar-foreground: oklch(0.985 0 0);
+    --sidebar-primary: oklch(0.488 0.243 264.376);
+    --sidebar-primary-foreground: oklch(0.985 0 0);
+    --sidebar-accent: oklch(0.269 0 0);
+    --sidebar-accent-foreground: oklch(0.985 0 0);
+    --sidebar-border: oklch(1 0 0 / 10%);
+    --sidebar-ring: oklch(0.556 0 0);
+
+    --support: rgb(255 110 190);
+    --link: rgb(80 190 255);
+    --selection: hsl(240 3.7% 22%);
+    --chart-1: oklch(0.87 0 0);
+    --chart-2: oklch(0.556 0 0);
+    --chart-3: oklch(0.439 0 0);
+    --chart-4: oklch(0.371 0 0);
+    --chart-5: oklch(0.269 0 0);
+}
+
+@theme inline {
+    /* Radius (for rounded-*) */
+    --radius-sm: calc(var(--radius) - 4px);
+    --radius-md: calc(var(--radius) - 2px);
+    --radius-lg: var(--radius);
+    --radius-xl: calc(var(--radius) + 4px);
+
+    /* Colors */
+    --color-background: var(--background);
+    --color-foreground: var(--foreground);
+    --color-muted: var(--muted);
+    --color-muted-foreground: var(--muted-foreground);
+    --color-popover: var(--popover);
+    --color-popover-foreground: var(--popover-foreground);
+    --color-card: var(--card);
+    --color-card-foreground: var(--card-foreground);
+    --color-border: var(--border);
+    --color-input: var(--input);
+    --color-primary: var(--primary);
+    --color-primary-foreground: var(--primary-foreground);
+    --color-secondary: var(--secondary);
+    --color-secondary-foreground: var(--secondary-foreground);
+    --color-accent: var(--accent);
+    --color-accent-foreground: var(--accent-foreground);
+    --color-destructive: var(--destructive);
+    --color-destructive-foreground: var(--destructive-foreground);
+    --color-ring: var(--ring);
+    --color-radius: var(--radius);
+    --color-sidebar: var(--sidebar);
+    --color-sidebar-foreground: var(--sidebar-foreground);
+    --color-sidebar-primary: var(--sidebar-primary);
+    --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
+    --color-sidebar-accent: var(--sidebar-accent);
+    --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
+    --color-sidebar-border: var(--sidebar-border);
+    --color-sidebar-ring: var(--sidebar-ring);
+    --color-support: var(--support);
+    --color-link: var(--link);
+
+    --breakpoint-xs: 540px;
+
+    --font-sans: 'Inter Variable', sans-serif;
+
+    --color-chart-5: var(--chart-5);
+
+    --color-chart-4: var(--chart-4);
+
+    --color-chart-3: var(--chart-3);
+
+    --color-chart-2: var(--chart-2);
+
+    --color-chart-1: var(--chart-1);
+
+    --radius-2xl: calc(var(--radius) * 1.8);
+
+    --radius-3xl: calc(var(--radius) * 2.2);
+
+    --radius-4xl: calc(var(--radius) * 2.6);
+}
+
+@layer base {
+    * {
+        @apply border-border outline-ring/50;
+    }
+
+    body {
+        @apply bg-background text-foreground;
+    }
+	html {
+		@apply font-sans;
+    }
+}
@@ -1,15 +1,14 @@
 <!doctype html>
 <html>
-
-<head>
+    <head>
        <meta charset="utf-8" />
        <link rel="icon" href="%sveltekit.assets%/favicon.png" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        <link rel="apple-touch-icon" href="%sveltekit.assets%/apple-touch-icon.png" />
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        %sveltekit.head%
-</head>
+    </head>

-<body data-sveltekit-preload-data="hover">
+    <body data-sveltekit-preload-data="hover">
        <div style="display: contents">%sveltekit.body%</div>
-</body>
-
+    </body>
 </html>
@@ -1,86 +0,0 @@
-@tailwind base;
-@tailwind components;
-@tailwind utilities;
- 
-@layer base {
-  :root {
-    --background: 0 0% 100%;
-    --foreground: 222.2 84% 4.9%;
- 
-    --muted: 210 40% 96.1%;
-    --muted-foreground: 215.4 16.3% 45%;
- 
-    --popover: 0 0% 100%;
-    --popover-foreground: 222.2 84% 4.9%;
- 
-    --card: 0 0% 100%;
-    --card-foreground: 222.2 84% 4.9%;
- 
-    --border: 214.3 31.8% 91.4%;
-    --input: 214.3 31.8% 91.4%;
- 
-    --primary: 222.2 47.4% 11.2%;
-    --primary-foreground: 210 40% 98%;
- 
-    --secondary: 210 40% 96.1%;
-    --secondary-foreground: 222.2 47.4% 11.2%;
- 
-    --accent: 210 40% 92%;
-    --accent-foreground: 222.2 47.4% 11.2%;
- 
-    --destructive: 0 72.2% 50.6%;
-    --destructive-foreground: 210 40% 98%;
-
-    --support: 220 15 130;
-
-    --link: 0 110 180;
- 
-    --ring: 222.2 84% 4.9%;
- 
-    --radius: 0.5rem;
-  }
- 
-  .dark {
-    --background: 222.2 84% 4.9%;
-    --foreground: 210 40% 98%;
- 
-    --muted: 217.2 32.6% 17.5%;
-    --muted-foreground: 215 20.2% 65.1%;
- 
-    --popover: 222.2 84% 4.9%;
-    --popover-foreground: 210 40% 98%;
- 
-    --card: 222.2 84% 4.9%;
-    --card-foreground: 210 40% 98%;
- 
-    --border: 217.2 32.6% 17.5%;
-    --input: 217.2 32.6% 17.5%;
- 
-    --primary: 210 40% 98%;
-    --primary-foreground: 222.2 47.4% 11.2%;
- 
-    --secondary: 217.2 32.6% 17.5%;
-    --secondary-foreground: 210 40% 98%;
- 
-    --accent: 217.2 32.6% 30%;
-    --accent-foreground: 210 40% 98%;
- 
-    --destructive: 0 62.8% 30.6%;
-    --destructive-foreground: 210 40% 98%;
-
-    --support: 255 110 190;
-
-    --link: 80 190 255;
- 
-    --ring: hsl(212.7,26.8%,83.9);
-  }
-}
- 
-@layer base {
-  * {
-    @apply border-border;
-  }
-  body {
-    @apply bg-background text-foreground;
-  }
-}
@@ -24,6 +24,14 @@ export async function handle({ event, resolve }) {

    let headTag = `<head>
    <title>gpx.studio — ${title}</title>
+    <script type="application/ld+json">
+    {
+        "@context": "https://schema.org",
+        "@type": "WebSite",
+        "name": "gpx.studio",
+        "url": "https://gpx.studio"
+    }
+    </script>
    <meta name="description" content="${description}" />
    <meta property="og:title" content="gpx.studio — ${title}" />
    <meta property="og:description" content="${description}" />
@@ -38,31 +46,20 @@ export async function handle({ event, resolve }) {
    <meta name="twitter:url" content="https://gpx.studio/" />
    <meta name="twitter:site" content="@gpxstudio" />
    <meta name="twitter:creator" content="@gpxstudio" />
-    <link rel="alternate" hreflang="x-default" href="https://gpx.studio${getURLForLanguage('en', path)}" />`;
+    <link rel="alternate" hreflang="x-default" href="https://gpx.studio${getURLForLanguage('en', path)}" />
+    <link rel="manifest" href="/${language}.manifest.webmanifest" />`;

+    if (page !== '404') {
        for (let lang of Object.keys(languages)) {
            headTag += `   <link rel="alternate" hreflang="${lang}" href="https://gpx.studio${getURLForLanguage(lang, path)}" />
 `;
        }
-
-    const stringsHTML = page === 'app' ? stringsToHTML(strings) : '';
+    }

    const response = await resolve(event, {
-        transformPageChunk: ({ html }) => html.replace('<html>', htmlTag).replace('<head>', headTag).replace('</body>', `<div class="fixed -z-10 text-transparent">${stringsHTML}</div></body>`)
+        transformPageChunk: ({ html }) =>
+            html.replace('<html>', htmlTag).replace('<head>', headTag),
    });

    return response;
 }
-
-function stringsToHTML(dictionary, strings = new Set(), root = true) {
-    Object.values(dictionary).forEach((value) => {
-        if (typeof value === 'object') {
-            stringsToHTML(value, strings, false);
-        } else {
-            strings.add(value);
-        }
-    });
-    if (root) {
-        return Array.from(strings).map((string) => `<p>${string}</p>`).join('');
-    }
-}
@@ -0,0 +1,171 @@
+export const surfaceColors: { [key: string]: string } = {
+    missing: '#d1d1d1',
+    paved: '#8c8c8c',
+    unpaved: '#6b443a',
+    asphalt: '#8c8c8c',
+    concrete: '#8c8c8c',
+    cobblestone: '#ffd991',
+    paving_stones: '#8c8c8c',
+    sett: '#ffd991',
+    metal: '#8c8c8c',
+    wood: '#6b443a',
+    compacted: '#ffffa8',
+    fine_gravel: '#ffffa8',
+    gravel: '#ffffa8',
+    pebblestone: '#ffffa8',
+    rock: '#ffd991',
+    dirt: '#ffffa8',
+    ground: '#6b443a',
+    earth: '#6b443a',
+    mud: '#6b443a',
+    sand: '#ffffc4',
+    grass: '#61b55c',
+    grass_paver: '#61b55c',
+    clay: '#6b443a',
+    stone: '#ffd991',
+};
+
+export function getSurfaceColor(surface: string): string {
+    return surfaceColors[surface] ? surfaceColors[surface] : surfaceColors.missing;
+}
+
+export const highwayColors: { [key: string]: string } = {
+    missing: '#d1d1d1',
+    motorway: '#ff4d33',
+    motorway_link: '#ff4d33',
+    trunk: '#ff5e4d',
+    trunk_link: '#ff947f',
+    primary: '#ff6e5c',
+    primary_link: '#ff6e5c',
+    secondary: '#ff8d7b',
+    secondary_link: '#ff8d7b',
+    tertiary: '#ffd75f',
+    tertiary_link: '#ffd75f',
+    unclassified: '#f1f2a5',
+    road: '#f1f2a5',
+    residential: '#73b2ff',
+    living_street: '#73b2ff',
+    service: '#9c9cd9',
+    track: '#a8e381',
+    footway: '#a8e381',
+    path: '#a8e381',
+    pedestrian: '#a8e381',
+    cycleway: '#9de2ff',
+    construction: '#e09a4a',
+    bridleway: '#946f43',
+    raceway: '#ff0000',
+    rest_area: '#9c9cd9',
+    services: '#9c9cd9',
+    corridor: '#474747',
+    elevator: '#474747',
+    steps: '#474747',
+    bus_stop: '#8545a3',
+    busway: '#8545a3',
+    via_ferrata: '#474747',
+};
+
+export const sacScaleColors: { [key: string]: string } = {
+    hiking: '#007700',
+    mountain_hiking: '#1843ad',
+    demanding_mountain_hiking: '#ffff00',
+    alpine_hiking: '#ff9233',
+    demanding_alpine_hiking: '#ff0000',
+    difficult_alpine_hiking: '#000000',
+};
+
+export const mtbScaleColors: { [key: string]: string } = {
+    '0-': '#007700',
+    '0': '#007700',
+    '0+': '#007700',
+    '1-': '#1843ad',
+    '1': '#1843ad',
+    '1+': '#1843ad',
+    '2-': '#ffff00',
+    '2': '#ffff00',
+    '2+': '#ffff00',
+    '3': '#ff0000',
+    '4': '#00ff00',
+    '5': '#000000',
+    '6': '#b105eb',
+};
+
+function createPattern(
+    backgroundColor: string,
+    sacScaleColor: string | undefined,
+    mtbScaleColor: string | undefined,
+    size: number = 16,
+    lineWidth: number = 4
+) {
+    let canvas = document.createElement('canvas');
+    canvas.width = size;
+    canvas.height = size;
+    let ctx = canvas.getContext('2d');
+    if (ctx) {
+        ctx.fillStyle = backgroundColor;
+        ctx.fillRect(0, 0, size, size);
+        ctx.lineWidth = lineWidth;
+
+        const halfSize = size / 2;
+        const halfLineWidth = lineWidth / 2;
+        if (sacScaleColor) {
+            ctx.strokeStyle = sacScaleColor;
+            ctx.beginPath();
+            ctx.moveTo(halfSize - halfLineWidth, -halfLineWidth);
+            ctx.lineTo(size + halfLineWidth, halfSize + halfLineWidth);
+            ctx.stroke();
+            ctx.beginPath();
+            ctx.moveTo(-halfLineWidth, halfSize - halfLineWidth);
+            ctx.lineTo(halfSize + halfLineWidth, size + halfLineWidth);
+            ctx.stroke();
+        }
+        if (mtbScaleColor) {
+            ctx.strokeStyle = mtbScaleColor;
+            ctx.beginPath();
+            ctx.moveTo(halfSize - halfLineWidth, size + halfLineWidth);
+            ctx.lineTo(size + halfLineWidth, halfSize - halfLineWidth);
+            ctx.stroke();
+            ctx.beginPath();
+            ctx.moveTo(-halfLineWidth, halfSize + halfLineWidth);
+            ctx.lineTo(halfSize + halfLineWidth, -halfLineWidth);
+            ctx.stroke();
+        }
+    }
+    return ctx?.createPattern(canvas, 'repeat') || backgroundColor;
+}
+
+const patterns: Record<string, string | CanvasPattern> = {};
+export function getHighwayColor(
+    highway: string,
+    sacScale: string | undefined,
+    mtbScale: string | undefined
+) {
+    let backgroundColor = highwayColors[highway] ? highwayColors[highway] : highwayColors.missing;
+    let sacScaleColor = sacScale ? sacScaleColors[sacScale] : undefined;
+    let mtbScaleColor = mtbScale ? mtbScaleColors[mtbScale] : undefined;
+    if (sacScale || mtbScale) {
+        let patternId = `${backgroundColor}-${[sacScale, mtbScale].filter((x) => x).join('-')}`;
+        if (!patterns[patternId]) {
+            patterns[patternId] = createPattern(backgroundColor, sacScaleColor, mtbScaleColor);
+        }
+        return patterns[patternId];
+    }
+    return backgroundColor;
+}
+
+const maxSlope = 20;
+export function getSlopeColor(slope: number): string {
+    if (slope > maxSlope) {
+        slope = maxSlope;
+    } else if (slope < -maxSlope) {
+        slope = -maxSlope;
+    }
+
+    let v = slope / maxSlope;
+    v = 1 / (1 + Math.exp(-6 * v));
+    v = v - 0.5;
+
+    let hue = ((0.5 - v) * 120).toString(10);
+    let lightness = 90 - Math.abs(v) * 70;
+
+    return `hsl(${hue},70%,${lightness}%)`;
+}
@@ -1,2 +1,4 @@
-import { parseGPX } from "gpx";
-export const exampleGPXFile = parseGPX(`<?xml version="1.0" encoding="UTF-8"?><gpx creator="StravaGPX" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.garmin.com/xmlschemas/PowerExtension/v1 http://www.garmin.com/xmlschemas/PowerExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd" version="1.1" xmlns="http://www.topografix.com/GPX/1/1" xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1" xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3" xmlns:gpxpx="http://www.garmin.com/xmlschemas/PowerExtension/v1" xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2"><metadata><name>Example</name><author><name>gpx.studio</name><link href="https://gpx.studio"/></author><time>2023-08-20T12:42:07.000Z</time></metadata><trk><name>Example</name><type>cycling</type><trkseg><trkpt lat="48.745764" lon="-66.658624"><ele>290.4</ele><time>2022-12-31T23:00:00.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>18</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.745974" lon="-66.658127"><ele>292.8</ele><time>2022-12-31T23:00:14.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>18</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.746592" lon="-66.658472"><ele>303.6</ele><time>2022-12-31T23:00:46.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>18</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.748063" lon="-66.660451"><ele>331.8</ele><time>2022-12-31T23:02:31.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>19</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.749297" lon="-66.650629"><ele>366</ele><time>2022-12-31T23:05:46.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>22</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.751879" lon="-66.646183"><ele>371.2</ele><time>2022-12-31T23:07:04.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>22</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.754389" lon="-66.646388"><ele>376</ele><time>2022-12-31T23:08:01.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>22</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.755973" lon="-66.642677"><ele>376.6</ele><time>2022-12-31T23:09:01.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>21</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.756134" lon="-66.640854"><ele>377.6</ele><time>2022-12-31T23:09:27.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>20</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.759941" lon="-66.633175"><ele>376.8</ele><time>2022-12-31T23:11:23.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>20</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.765632" lon="-66.635593"><ele>410.6</ele><time>2022-12-31T23:14:38.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>23</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.764883" lon="-66.630508"><ele>390.4</ele><time>2022-12-31T23:15:42.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>23</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.772418" lon="-66.633652"><ele>419.8</ele><time>2022-12-31T23:19:41.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>19</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.775935" lon="-66.633982"><ele>430</ele><time>2022-12-31T23:21:25.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>19</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.779656" lon="-66.636621"><ele>430.2</ele><time>2022-12-31T23:23:04.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>18</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.780914" lon="-66.636833"><ele>431.2</ele><time>2022-12-31T23:23:32.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>18</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.7868" lon="-66.632505"><ele>434</ele><time>2022-12-31T23:26:05.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>17</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.787548" lon="-66.632642"><ele>435.6</ele><time>2022-12-31T23:26:28.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>17</gpxtpx:atemp></gpxtp
Line truncated
+import { parseGPX } from 'gpx';
+export const exampleGPXFile = parseGPX(
+    `<?xml version="1.0" encoding="UTF-8"?><gpx creator="StravaGPX" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd http://www.garmin.com/xmlschemas/PowerExtension/v1 http://www.garmin.com/xmlschemas/PowerExtensionv1.xsd http://www.topografix.com/GPX/gpx_style/0/2 http://www.topografix.com/GPX/gpx_style/0/2/gpx_style.xsd" version="1.1" xmlns="http://www.topografix.com/GPX/1/1" xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1" xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3" xmlns:gpxpx="http://www.garmin.com/xmlschemas/PowerExtension/v1" xmlns:gpx_style="http://www.topografix.com/GPX/gpx_style/0/2"><metadata><name>Example</name><author><name>gpx.studio</name><link href="https://gpx.studio"/></author><time>2023-08-20T12:42:07.000Z</time></metadata><trk><name>Example</name><type>cycling</type><trkseg><trkpt lat="48.745764" lon="-66.658624"><ele>290.4</ele><time>2022-12-31T23:00:00.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>18</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.745974" lon="-66.658127"><ele>292.8</ele><time>2022-12-31T23:00:14.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>18</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.746592" lon="-66.658472"><ele>303.6</ele><time>2022-12-31T23:00:46.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>18</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.748063" lon="-66.660451"><ele>331.8</ele><time>2022-12-31T23:02:31.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>19</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.749297" lon="-66.650629"><ele>366</ele><time>2022-12-31T23:05:46.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>22</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.751879" lon="-66.646183"><ele>371.2</ele><time>2022-12-31T23:07:04.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>22</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.754389" lon="-66.646388"><ele>376</ele><time>2022-12-31T23:08:01.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>22</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.755973" lon="-66.642677"><ele>376.6</ele><time>2022-12-31T23:09:01.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>21</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.756134" lon="-66.640854"><ele>377.6</ele><time>2022-12-31T23:09:27.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>20</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.759941" lon="-66.633175"><ele>376.8</ele><time>2022-12-31T23:11:23.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>20</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.765632" lon="-66.635593"><ele>410.6</ele><time>2022-12-31T23:14:38.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>23</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.764883" lon="-66.630508"><ele>390.4</ele><time>2022-12-31T23:15:42.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>23</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.772418" lon="-66.633652"><ele>419.8</ele><time>2022-12-31T23:19:41.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>19</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.775935" lon="-66.633982"><ele>430</ele><time>2022-12-31T23:21:25.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>19</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.779656" lon="-66.636621"><ele>430.2</ele><time>2022-12-31T23:23:04.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>18</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.780914" lon="-66.636833"><ele>431.2</ele><time>2022-12-31T23:23:32.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>18</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.7868" lon="-66.632505"><ele>434</ele><time>2022-12-31T23:26:05.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>17</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions></trkpt><trkpt lat="48.787548" lon="-66.632642"><ele>435.6</ele><time>2022-12-31T23:26:28.024Z</time><extensions><gpxtpx:TrackPointExtension><gpxtpx:atemp>17</gpxtpx:atemp></gpxtpx:TrackPointExtension></extensions>
Line truncated
+);
@@ -1,31 +0,0 @@
-export const surfaceColors: { [key: string]: string } = {
-    'missing': '#d1d1d1',
-    'paved': '#8c8c8c',
-    'unpaved': '#6b443a',
-    'asphalt': '#8c8c8c',
-    'concrete': '#8c8c8c',
-    'chipseal': '#8c8c8c',
-    'cobblestone': '#ffd991',
-    'unhewn_cobblestone': '#ffd991',
-    'paving_stones': '#8c8c8c',
-    'stepping_stones': '#c7b2db',
-    'sett': '#ffd991',
-    'metal': '#8c8c8c',
-    'wood': '#6b443a',
-    'compacted': '#ffffa8',
-    'fine_gravel': '#ffffa8',
-    'gravel': '#ffffa8',
-    'pebblestone': '#ffffa8',
-    'rock': '#ffd991',
-    'dirt': '#ffffa8',
-    'ground': '#6b443a',
-    'earth': '#6b443a',
-    'snow': '#bdfffc',
-    'ice': '#bdfffc',
-    'salt': '#b6c0f2',
-    'mud': '#6b443a',
-    'sand': '#ffffc4',
-    'woodchips': '#6b443a',
-    'grass': '#61b55c',
-    'grass_paver': '#61b55c'
-}