Global Digital Elevation Map Released to The Public
Massive satellite derived digital elevation data base released to the public. NASA and Japan’s Ministry of Economy, Trade and industry (METI) announced the release of the ASTER Global Digital Elevation Model (GDEM) digital elevation maps. The GDEM was created by stereo-correlating the 1.3 million scene ASTER VNIR archive, covering the Earth’s land surface between 83N […]
Massive satellite derived digital elevation data base released to the public. NASA and Japan’s Ministry of Economy, Trade and industry (METI) announced the release of the ASTER Global Digital Elevation Model (GDEM) digital elevation maps. The GDEM was created by stereo-correlating the 1.3 million scene ASTER VNIR archive, covering the Earth’s land surface between 83N and 83S latitudes. The GDEM is produced with 30 meter postings, and is formatted in 1 x 1 degree tiles as GeoTIFF files. Each GDEM file is accompanied by a Quality Assessment file, either giving the number of ASTER scenes used to calculate a pixel’s value, or indicating the source of external DEM data used to fill the ASTER voids. http://asterweb.jpl.nasa.gov/gdem.asp