Free DEMs

When free is all you can afford, the elevation models below are excellent resources to use in your next GIS, geospatial and/or remote sensing project. For projects requiring higher resolution or more recent coverage than the free DEMs offer, an Apollo Mapping representative would be happy to discuss the various options. You can reach us here at any time.

Please let us know by email if any of these download links do not work!

Shuttle Radar Topography Mission (SRTM)
ASTER Global Digital Elevation Model (GDEM)
USGS National Elevation Dataset (NED)