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ACRONYMS AND ABBREVIATIONS AI Artificial intelligence DEM Digital elevation model DLG Digital line graph DLG-E Digital line graph-enhanced DMA Defense Mapping Agency DOI Department of the Interior EDC EROS Data Center (Sioux Falls, South Dakota) EOS Earth Observing System, a proposed NASA Earth monitoring satellite system EPA Environmental Protection Agency FIPS Federal information processing standard GIS Geographic information systems GLDIS Global Land Data and Information Management System GRID Global Resources Information Database ISO International Standards Organization Mark-II System being developed by USGS/NMD for production (both digital and hardcopy) of map information Mark-90 System being developed by DMA for map production and digital data requirements of the Department of Defense 44

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45 NASA National Aeronautics and Space Administration NCGIA National Center for Geographic Information and Analysis NDCDB National Digital Cartographic Data Base NMD National Mapping Division of the USGS NQAA National Oceanic and Atmospheric Administration SDSS Spatial decision support system SDTS Spatial Data Transfer Standard SLAR Side-looking airborne radar UNEP United Nations Environment Programme URISA Urban and Regional Information Systems Association USGS U.S. Geological Survey, Department of the Interior

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