add custom layer base from openfreemap (osm liberty)

website/src/lib/assets/layers.ts

@@ -27,10 +27,12 @@ import ignFrTopo from './custom/ign-fr-topo.json';
 import ignFrPlan from './custom/ign-fr-plan.json';
 import ignFrSatellite from './custom/ign-fr-satellite.json';
 import bikerouterGravel from './custom/bikerouter-gravel.json';
+import topo from './custom/topo.json';
 
 export const maptilerKeyPlaceHolder = 'MAPTILER_KEY';
 
 export const basemaps: { [key: string]: string | StyleSpecification } = {
+    topo: topo as StyleSpecification,
     maptilerStreets: `https://api.maptiler.com/maps/streets-v4/style.json?key=${maptilerKeyPlaceHolder}`,
     maptilerTopo: `https://api.maptiler.com/maps/topo-v4/style.json?key=${maptilerKeyPlaceHolder}`,
     maptilerOutdoors: `https://api.maptiler.com/maps/outdoor-v4/style.json?key=${maptilerKeyPlaceHolder}`,
@@ -799,6 +801,7 @@ export type LayerTreeType = { [key: string]: LayerTreeType | boolean };
 export const basemapTree: LayerTreeType = {
     basemaps: {
         world: {
+            topo: true,
             maptilerStreets: true,
             maptilerTopo: true,
             maptilerOutdoors: true,
@@ -936,7 +939,7 @@ export const overpassTree: LayerTreeType = {
 };
 
 // Default basemap used
-export const defaultBasemap = 'maptilerStreets';
+export const defaultBasemap = 'topo';
 
 // Default overlays used (none)
 export const defaultOverlays: LayerTreeType = {
@@ -1025,6 +1028,7 @@ export const defaultOverpassQueries: LayerTreeType = {
 export const defaultBasemapTree: LayerTreeType = {
     basemaps: {
         world: {
+            topo: true,
             maptilerStreets: true,
             maptilerTopo: true,
             maptilerOutdoors: true,