Link here to see a detail of the Blue Ridge Mountain visibility map. The thick green line shows the first 330 of the more than 1,000 points used for this calculation, which took about a day on a 300 MHz Pentium-II PC to execute.
Their task is to consist of determining the visible part s of the terrain from a certain spot on the surface and to map the result in a visibility map. First, the DTM must be created from a scanned contour map.
 See also: Infrastructure, Information, Document, Access, Location
  
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