Data sources & attribution

Ski area, run & lift data

Resort boundaries, runs, and lifts are derived from OpenStreetMap contributors, via OpenSkiMap. This data is © OpenStreetMap contributors and is available under the Open Database License (ODbL).

Open database offer. The underlying OSM-derived ski database we build from is published by OpenSkiMap and can be downloaded in full at tiles.openskimap.org/geojson (ski_areas.geojson, runs.geojson, lifts.geojson). Our own import step is a straightforward load of those files; the geometry we serve is a simplified rendering of that public database. Proprietary enrichment we add (such as nearby-business listings) is kept as a separate, collective layer and is not part of the OSM-derived database.

3D terrain & imagery

• Elevation: AWS Terrain Tiles (Terrarium encoding), an open dataset on the AWS Open Data Registry. Sources include SRTM, and national elevation datasets; see the dataset attribution.
• Satellite imagery: Esri World Imagery, used under Esri's attribution terms (Esri, Maxar, Earthstar Geographics, and the GIS community).

Weather & conditions

Snow and weather forecasts (where shown) are provided by weather data partners and credited on the pages where they appear.

Corrections

Trail and lift data comes from OpenStreetMap — if something looks wrong, the best fix is to edit it on OpenStreetMap, and it will flow through on our next update. For anything else, contact us.