Digital line graphs are digital vector data, and they contain a very wide variety of information. They usually contain, topography, boundaries, roads and utility lines to name a few. Data in a DLG is always stored and shown in the form of lines, points and areas. These maps are comprised of topographic and planimetric map features. The digital line graph that is shown is an illustration of raster text scanned with a mylar seperate. Asd you can see on the map there are many different surface features shown, including many various contour lines incorporated into the mapping of the area.
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