Monday, November 21, 2011

DRG

http://www.mapmart.com/Products/TopographicalMaps/SeamlessDRG.aspx

Digital Raster Graphic Maps are used to combine topographical and digital information. They use the US Geological Survey map as a backdrop and can overlay digital data over it, in order to make the maps more useful. This map shows lakes and parks overlaid with isometric lines to denote elevation.

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