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Approximating Visibility
Terminology
Viewshed
: What specific points can an observer see?
Visibility index:
How many points can this observer see?
Sample terrain from South Korea, color-coded by elevation
Visibility indices of every point, colored similarly
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Approximating Visibility
, GIScience 2000, Savannah, Georgia, USA, 30 Oct 00,
Wm. Randolph Franklin