LIDAR is laser- pulse based imagery that when combined with a GIS mapping program create stunningly detailed portrayals of highly specialized surface phenomena. This particular picture is a digital elevation map and covers a 675 sq KM region in Rex, NC. Topographic elevation is represented by the shade of colors on the map, the lightest in the bottom right corner represents 16 m and the darkest, 76 m in the upper left.
http://cintos.org/LiDAR_images/
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