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Cartography / Geography / GIS file formats / United States Geological Survey / Geographic information systems / Remote sensing / Physical geography / Geomatics / USGS DEM / Digital elevation model / Digital line graph / Topography


USGS DIGITAL CARTOGRAPHIC DATA BASE Robert B. McEwen Harry R. Jacknow U.S. Geological Survey Reston, VirginiaIntroduction
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Document Date: 2008-08-29 23:31:58


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