SPOT Image: High Resolution DEMs in Alaska

SPOT Image Corporation is pleased to announce the recent completion of thirteen Reference3D geocells over the Chugach National Forest region of Alaska. These geocells are notable, as they provide the first broad area, DTED-2 quality DEM coverage in Alaska.

Reference3D provides a great DEM solution to fill in areas of Alaska where Shuttle Radar Topography Mission (SRTM) DEM data is not currently available. The US Government has already purchased this data as a cost effective solution for their project in the Chugach National Forest region.

Reference3D is a unique geospatial product which is made up of a DTED-2 DEM, a 5m ortho-image, and a series of eight quality masks to allow users to view imagery that has been overlaid on a multi-dimensional landscape. Reference3D is produced using data collected from the High Resolution Stereo (HRS) sensor, a secondary instrument onboard the SPOT 5 satellite, which acquires stereoscopic images.

Reference3D is produced in Toulouse, France, in a partnership between Spot Image, S.A., SPOT Image Corporation’s parent company, and IGN Espace, an element of the Institut Geographique National, the French government cartographic agency.

Currently, Spot Image has collected over 112 million km2 of qualified HRS coverage from which Reference3D can be produced.