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GRASS Help System |
DMA: Elevation
Data Source: Defense Mapping Agency Aerospace Center 3200 S. 2nd St. St. Louis, MO 63118-3399 Attn: PPGD
Data Format: raster
Scale: 1:250000
Data Coverage: Entire U.S. and many parts of the world.
Data Description: Regular array of elevation values latitude/longitude referenced with a spacing of 3 arc-seconds. Data are produced by digitizing 1:250000 topographic maps. For more information refer to USGS Circular 895-B, which describes both the DEMs produced by USGS and those produced by the DMA.
Media: Non-governmental parties order data through the USGS. Data are available on 9-track, 1600 bpi magnetic tape.
Aquisition Costs: USGS: $75.00 per 1 degree x 1 degree block plus $25 service charge.
Comments: For more information contact the DMA at the address shown above under "Data Source" or:
National Cartographic Information Center U.S. Geological Survey User Services Section 507 National Center Reston, VA 22092 Phone: 703-860-6045
Request USGS Circular 895-B "Digital Elevation Models"