How to use it
- Type a place, press My location, or click the map.
- Read the elevation in metres and feet.
- Click anywhere else on the map to read the height there. Drag the pin to probe around.
5 practical uses
- Check the height of a house, a plot or a campsite.
- Find the elevation of a road pass or a trailhead.
- Check a spot for flood risk by its height above a river.
- Set the altitude on a barometer, a watch or a drone.
- Compare the heights of two places.
The maths behind it
The elevation service reads a digital elevation model: a raster of heights with cells of 30 to 90 m from radar and satellite surveys (SRTM, Copernicus). The height at a point is interpolated between the four cells around it. The air pressure shown uses the barometric formula p = 1013.25 (1 − 2.25577×10⁻⁵ h)^5.25588 hPa.
Where the heights come from
Heights come from the routing engine's elevation service (Valhalla at FOSSGIS, on SRTM and similar 30 m and 90 m models) and, if that is busy, from Open-Meteo's copy of the Copernicus 90 m model. They are the height of the ground in a cell of that size, so a point on a cliff edge or a narrow ridge can read some metres off, and buildings and trees are not included. Sea is 0.
For the heights along a route, see the elevation profile; for a GPX track's climb, the GPX viewer.