4 ms·

So how are these contour lines being generated? My hike of a few months ago: https://www.gaiagps.com/datasummary/route/67dcc2001bea9e9e394fa45ca935ff9f/?layer

• rmc 9y ago
  > So how are these contour lines being generated? It depends on the people make the map. That map uses Thunderforest's Outdoor style[1]. The person running that company is a long time OSM contributor, but that isn't "from the OpenStreetMap project". I suspect they are using SRTM data to generate countour lines in addition to OSM to create the map > why do you need a GPS tracker with a barometric sensor in order to map for OSM? You don't? You can map for OSM without needed a GPS tracker. You can just trace things from the aerial imagery, or add local features from memory ("There's a post office at that road junction", "the speed limit of this road is 40 kmph"). [1] https://www.thunderforest.com/maps/outdoors/ https://www.thunderforest.com/maps/outdoors/