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Date: 2008-08-30 01:13:15Geographic information systems Cartography Data modeling Geography Geological surveys Archaeology Physical geography Data model United States Geological Survey Digital line graph Topography GIS applications | GEOGRAPHIC INFORMATION SYSTEM DEVELOPMENTS WITHIN THE U.S. GEOLOGICAL SURVEY David A. Nystrom U.S. Geological Survey 521 National CenterAdd to Reading ListSource URL: mapcontext.comDownload Document from Source WebsiteFile Size: 635,10 KBShare Document on Facebook |