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TNM_Contours (0)
Contours were generated for the conterminous United States from the 1 arc-second National Elevation Dataset (NED, and can be displayed between 1:289K and 1:72K scales in The National Map Viewer. The NED serves as the elevation layer of The National Map, and provides basic elevation information for earth science studies and mapping applications. Scientists and resource managers use NED data for global change research, hydrologic modeling, resource monitoring, mapping and visualization, and many other applications. For additional information, go to http://ned.usgs.gov.
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