I present an experimental study of a new algorithm that synthesizes separate programs, for fast viewshed, and for fast approximate visibility index determination, into a working testbed for quickly siting multiple observers jointly to cover terrain from a full level-1 DEM.

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Example Videos

Here are some videos illustrating points mentioned here.

overlay-intervis.mpg: Incrementally adding observers, with intervisibility..

overlay-nointervis.mpg: Incrementally adding observers, without intervisibility..

cube-inc.mpg: Many overlapping cubes, for computing union volume, area and edge length