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U.S. Geological Survey
(USGS)
USGS: Elevation
Data Source:
National Cartographic Information Center
U.S. Geological Survey
User Services Section
507 National Center
Reston, VA 22092
Phone: 703-860-6045
Data Format:
Raster
Scale:
1:24000
Data Coverage:
Scattered quads throughout U.S. For current coverage write/call for
"Index to Digital Line Graph & Digital Elevation Model Data".
Data Description:
A regular array of elevation values referenced
to the UTM coordinate system with a spacing of
30 meters. Data are collected by either digitizing
7.5' contour overlays or scanning of photographs.
The data is available in one of three levels:
Level 1 - raw elevation data, only gross errors edited
Level 2 - data smoothed and edited to remove random errors
Level 3 - data edited and modified to ensure positional accuracy
Media:
Aquisition Costs:
$100/quad with a $25/tape service charge
Comments:
The NCIC/USGS also distributes digital elevation
data produced by the Defense Mapping Agency (DMA).
This data has a scale of 1:250000, is latitude/longitude
referenced, and a sampling interval of 3 arc seconds.
For more information see the Data Source Report for the
Defense Mapping Agency (DMA).
Information obtained from the USGS Circular 895-B
"Digital Elevation Models".
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Automatically created on: Thu Jan 15 17:47:15 2004