Digital Elevation Models (DEMs)

Providing geospatial professionals worldwide with uniformly accurate, wide-area 3D digital elevation data

Proprietary Mapping Technology Creates Superior DEMs
The high-quality 3D digital mapping data afforded by our proprietary airborne interferometric synthetic aperture radar (IFSAR) technology meet the demanding needs of a wide range of geospatial applications. Our IFSAR DEMs are collected as part of our NEXTMap^® countrywide mapping program at 5-meter post spacings, feature a vertical accuracy RMSE of 1 meter, and include: 

Digital surface model (DSM) — a topographic model of the earth's surface that includes buildings, vegetation, roads, and natural terrain features. The key benefit of the DSM is that it provides a geometrically correct base map.

Digital terrain model (DTM) — a topographic model of the bare earth that has had vegetation, buildings, and other cultural features digitally removed, enabling users to infer terrain characteristics possibly hidden in the DSM. Intermap has two versions of DTMs available — to learn more, see "DTM v1.0 & DTM v.1.5" information.

Third-party Verification

Eleven independent agencies have validated our data, including USGS, NGA, NASA, U.S. Forest Service, U.S. Army Corps of Engineers TEC, University of Washington, University of Stuttgart, the Environment Agency of England & Wales, and University College London.