The image above is a digital rastor graphic (DRG). DRGs are digitally scanned images of U.S. Geological
Survey (USGS) standard series topographic maps, also known as topos. These topos are created by taking aerial photographs and then using a stereoscope to give them a three-dimensional effect. As such, DRG's show a regions elevation, topography, and surface features. Also, like topos, they are georectified using the UTM and state plane coordinates. This makes them perfect maps for car trips and directions.
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