Attribution

Some of what you see here is other people's work. The trails, the stories, the medals and the elevation profiles are ours. The basemaps, the landmark photographs and the two typefaces are not, so here is who made them.

Maps and imagery

• Trail maps. Vector basemap © OpenStreetMap contributors, under the ODbL; tiles by Protomaps.
• The route maps on this site. Satellite imagery © Esri — sources: Esri, Maxar, Earthstar Geographics, and the GIS User Community (Esri World Imagery).
• Satellite imagery in the app. Contains modified Copernicus Sentinel-2 data, via the AWS Open Data registry. The South Pole is the one trail Web Mercator cannot draw, so its map is polar-projected NASA GIBS MODIS imagery (public domain).
• Elevation. Every profile on this site is sampled from a public 30 m digital elevation model (SRTM, ASTER and Mapzen terrain tiles) along each trail's real route. The figures are ours to get wrong, not a guidebook's: where a trail's high point carries a "~", it is our reading of the ground rather than a surveyed number.

Landmark photographs

The photographs of the places you walk past are other people's work, taken by people who were there and given away freely. Most are from Wikimedia Commons and Wikipedia; a few come from Openverse, Flickr and Mapillary. Each one below names its own photographer, its own source and its own licence, and the app names the photographer on the picture itself.

Every landmark photograph in the app, with its photographer and its licence. There are 914 of them, across 41 trails. Each licence below links to its full text.

Type

• Fraunces and Hanken Grotesk typefaces, both under the SIL Open Font License.

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