Wednesday, July 30, 2008

DRG map

lter.kbs.msu.edu/maps/gis_data.php

The above map is known as a digital raster map, or a DRG, and is really helpful in mapping topography and geographical features of the land. DRG maps, especially seen in this example, are great because they are taken from topographical maps and then scanned so that they are able to fit into a Mercator projection, which is helpful because it gives more of a realistic view to viewers. This map is very useful for hikers and other outdoor sports that need to navigate their way around because not only are there geographical features, such as lakes, forests, streams, etc. but there are also contour lines that are able to show different heights, representing mountains or hills.

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