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GRASS Help System |
Digital Terrain Elevation Data (DTED) - Elevation data produced and supplied by the Defense Mapping Agency (DMA); the digital equivalent of the elevation data on a topographic map. Currently available at two resolutions; Level 1 (DTED-1) data has resolution of roughly 100 meters, while Level 2 (DTED-2) data has a resolution of roughly 30 meters.