Sunday, November 20, 2011

DRG

http://egsc.usgs.gov/isb/pubs/factsheets/fs08801.html

A DRG or Digital raster graphic, is developed by scanning a paper map onto a computer. These are useful for storing into archives for other to locate online. I know personally I use maps similar to this when I conduct land navigation. Everything from contour lines to roads and buildings are shown

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