Shade route
–% shaded
Finding the sun
Pick two points on the map.
Shortest route
–% shaded
Extra walking allowed
- Building shadows at this time
- Shade route, blue in shade and orange in sun
- Shortest route
- Building with no mapped height (drawn 10 m)
How it works, and what it misses
The sun's position comes from the NOAA solar equations for the date and time you pick. Every building in OpenStreetMap is treated as a block of its mapped height, and its shadow is cast on flat ground. Each footpath and street is checked every 1.5 m to see if it is in shadow, and the router looks for the path with the least sun that stays within your detour limit.
What it misses: trees, shade sails, arcades and bus shelters are not modelled (only footpaths tagged as covered count as shade). Shade is not the same as cool: hot walls and ground still radiate heat.
Map data © OpenStreetMap contributors (ODbL). Base map by OpenFreeMap, OpenMapTiles.