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Sampling a 3D building and performing intervisibility analysis

Question asked by pgao on May 5, 2016

The attached figure is a snapshot of the ESRI 3D Urban Analysis. The yellow dots around the right building are the sampling points of the 3D building. I tried many ways, but failed to reproduce it. Could anyone tell me how to do it? Also, the left buildings are demonstrated as stacked grid cells and the graded color representing the degree of visibility. I very much like to do it, but I have no idea on how. Could  anyone provide some clues?  --- thanks

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