Sources and licences
Vertex Maps is built on data from public agencies, open-data projects and map providers. This page lists every source, what we use it for and its licence. Where a licence asks for credit, the credit also appears next to the data in the app.
Maps and terrain
| Source | Used for | Licence |
|---|---|---|
| © MapTiler | Place names, contours, place search, elevation, weather map base | MapTiler Cloud terms |
| © OpenStreetMap contributors | Base map, ski pistes, routes | ODbL 1.0 |
| OpenSnowMap | Ski piste overlay | Tiles CC BY-SA; data © OpenStreetMap contributors |
| © Mapterhorn | 3D terrain, hillshade, slope and aspect, offline terrain | Compiled from open elevation data, mostly CC BY 4.0; see Mapterhorn for each source |
Weather
| Source | Used for | Licence |
|---|---|---|
| Weather data by Open-Meteo.com | Forecasts, powder, snowpack, wind loading, Today | CC BY 4.0; models from DWD, ECMWF, Météo-France, MeteoSwiss, NOAA and others |
| MapTiler Weather | Radar, wind, temperature and precipitation on the weather map | MapTiler Cloud terms |
Measured snow depth
The app shows the nearest station's latest reading. The station's provider is named under the reading.
| Provider | Area | Licence |
|---|---|---|
| WSL Institute for Snow and Avalanche Research SLF | Switzerland, Liechtenstein | CC BY 4.0 |
| GeoSphere Austria | Austria | CC BY 4.0 |
| Lawinenwarndienst Tirol, Südtirol, Trentino (avalanche.report) | Tirol, South Tyrol, Trentino | CC BY 4.0 |
| Avalanche warning services via lawinen-warnung.eu | Austria, Bavaria, Slovenia | CC BY 4.0 |
| ARPA Lombardia | Lombardy | CC0 1.0 |
| ARPAV | Veneto | CC BY 4.0 |
| ARPA Piemonte | Piedmont | CC BY 4.0 |
| Slovene Public Information, EARS – meteo.si | Slovenia | Free re-use with attribution |
| Météo-France | French Alps and Pyrenees | Licence Ouverte 2.0 |
| SMHI | Sweden | CC BY 4.0 |
| USDA NRCS SNOTEL | United States | Public domain |
Avalanche bulletins
Bulletins come from the official avalanche warning services through the EAWS network and avalanche.org in the United States. Each bulletin in the app names its issuing service and links to the full original. Texts may be shortened. Warning region outlines: EAWS regions (CC0). Norwegian bulletins: Varsler fra Snøskredvarslingen i Norge og www.varsom.no.
Satellite images
Contains modified Copernicus Sentinel data 2026. Images are Sentinel-2 L2A scenes from the AWS Open Data archive, found through Element 84's Earth Search. Sentinel data legal notice.
Ski touring and off-piste routes
| Source | Licence |
|---|---|
| OpenStreetMap contributors | ODbL 1.0 |
| Camptocamp.org | CC BY-SA 3.0; route coordinates also ODbL |
| © swisstopo, SAC | swisstopo terms |
| Kartverket, Turrutebasen | CC BY 4.0 |
| Naturvårdsverket | CC0 1.0 |
The route libraries are a database derived from OpenStreetMap and Camptocamp. They are available under the ODbL and CC BY-SA in the same form the app uses: Alps (index, licence), Nordic (index, licence), Caucasus (index, licence). Each route names its source and author and links to the original.
Software
| Library | Licence |
|---|---|
| MapLibre GL JS | BSD-3-Clause |
| MapTiler SDK JS | BSD-3-Clause |
| MapTiler Weather | MapTiler terms |
| geotiff.js | MIT |
Questions about a source or a credit? See our Privacy Policy for how to contact us.