Notes: | "Scale of poster is approximately 1:4,000,000." Relief shown by gradient tints and shading. "The U.S. Geological Survey (USGS) has completed a seamless elevation dataset for the entire United States. The National Elevation Dataset (NED) was produced from over 57,000 individual digital elevation models, and is updated bimonthly to incorporate newly-producted elevation data." Distributed by USGS to depository libraries on paper under Item 0619-G-17 on Shipping list no. 2004-03-TQ. Online documentation, viewing, and access to the NED are available at the USGS web site. Address as of 7/9/04: http://ned.usgs.gov; current access is available via PURL.
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