The service provides information about altitude and topography for places on the Earth. Sources for topographic data include the Shuttle Radar Topography Mission (SRTM) and the GTOPO30 project of the U.S. Geological Service (USGS). Data describes contours and primary features of all continents except Antarctica at a horizontal resolution of about 90 meters.
API methods support submission of a place or list of places, specified by latitude and longitude or GPS coordinates, to retrieve altitude, distance apart, and intermediate locations. The API generates an altitude profile for the route between the specified places, which can help to route's steepness or to verify the visibility of one point from another. Distance measurements account for the curvature of the Earth.