fix overlay opacity

website/src/lib/components/layer-control/LayerControl.svelte

@@ -60,6 +60,20 @@
 			if (typeof overlay === 'string') {
 				$map.addImport({ id, url: overlay });
 			} else {
+				if ($opacities.hasOwnProperty(id)) {
+					overlay = {
+						...overlay,
+						layers: overlay.layers.map((layer) => {
+							if (layer.type === 'raster') {
+								if (!layer.paint) {
+									layer.paint = {};
+								}
+								layer.paint['raster-opacity'] = $opacities[id];
+							}
+							return layer;
+						})
+					};
+				}
 				$map.addImport({
 					id,
 					data: overlay
@@ -82,9 +96,7 @@
 					$map.removeImport(i.id);
 				});
 				let toAdd = Object.entries(overlayLayers)
-                    .filter(
+					.filter(([id, selected]) => selected && !activeOverlays.some((j) => j.id === id))
-                        ([id, selected]) => selected && !activeOverlays.some((j) => j.id === id)
-                    )
 					.map(([id]) => id);
 				toAdd.forEach((id) => {
 					addOverlay(id);