External map layer

To add an external WMS layer to the tracking map.

In Map settings >> External layer

sample map with swiss topo layer: https://racemap.com/player/swiss-topo-sample

URL to call external layer: https://wms.geo.admin.ch/?SERVICE=WMS&REQUEST=GetMap&VERSION=1.3.0&LAYERS=ch.swisstopo.swissimage&STYLES=default&CRS=EPSG:3857&BBOX={bbox-epsg-3857}&WIDTH=256&HEIGHT=256&FORMAT=image/png

more about swiss topo. https://www.geo.admin.ch/en/geo-services/geo-services/portrayal-services-web-mapping/web-map-services-wms.html

https://wms.geo.admin.ch/
     ?SERVICE=WMS
     &REQUEST=GetMap
     &VERSION=1.3.0
     &LAYERS=ch.swisstopo.swissimage
     &STYLES=default
     &CRS=EPSG:3857
     &BBOX={bbox-epsg-3857}
     &WIDTH=256
     &HEIGHT=256
     &FORMAT=image/png

SERVICE	WMS
REQUEST	GetMap
VERSION	1.3.0 or 1.1.0
STYLES	empty
CRS (1.3.0) or SRS (1.1.0)	EPSG:3857
BBOX	{bbox-epsg-3857} a variable
WIDTH	256; same as tile size respectively
HEIGHT	256; same as tile size respectively
FORMAT	image/png or image/jpeg
TRANSPARENT	true

LAYERS: different, available in GetCapabilities e.g. https://wxs.ign.fr/yourkey/geoportail/r/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetCapabilities

Use GeoTIFF

2MB

73-110-2025_Le Tal.tif

image

Open

Download the sample file GeoTiff

1. mapbox style editor "Create a style" and "Start from scratch"

   
2. Add a "Custom layer" and upload the GeoTIFF or KML file.

   
3. mapbox creates the layer ID once the GeofTIFF is uploaded racemap.48p1az6b

   
4. RACEMAP >> Map Settings >> External Layers Add URL as external WMS: https://api.mapbox.com/v4/racemap.48p1az6b/{z}/{x}/{y}.png?access_token={privateKeyMapbox} and replace {privateKeyMapbox} with your mapbox key.

   

The result shows the original TIFF file: https://racemap.com/player/6a01a8d5bd1f6d9fc6f4f50d

Remove the border in the GeoTIFF

1. Free download of QGIS

2. Load GeoTIFF and create a new GeoPackage-layer

   
3. Select "Polygon"

4. Define borders with the pencil and polygon tool - left click: add point, right click: finish polygon.

   
5. Raster >> Extraction >> Clip Raster by Mask Layer: Data outside the polygon is removed.

1. Select the GeoTIFF as the input file, the mask layer to use (previously created), enable "Create an output alpha band" and "Keep resolution of input raster".

   

   6. QGIS generates a new GeoTIFF file, which you now use to create another mapbox layer.

Sample: https://racemap.com/player/external-layer-mask/

We needed to run "Fix Geometries" in QGIS before extraction processed successfully.