Map data sources

Base map

Colour base map tiles: © CARTO , map data © OpenStreetMap contributors. Swiss vector detail: © swisstopo — Federal Office of Topography.

• Colour tiles: CARTO Voyager raster basemap (OpenStreetMap data)
• Vector service: swisstopo Base Map vector tiles (ch.swisstopo.base.vt)
• Typography: swisstopo font service
• Rendering: MapLibre GL JS (3-clause BSD licence)

Terms of use

swisstopo geodata is provided under the Federal Act on Geoinformation and the associated open government data terms, which require the source to be acknowledged. That acknowledgement is shown on this page and inside the map through the “Map info” control.

Drop locations

Marker positions come from the venue attached to each Drop. Demo Drops shown before launch use fictional Geneva venues and approximate positions, and are labelled as demo data.