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Offset B is the height of the target object. Imagine that you want to know if you would see the top of a NEW house in the landscape (the house is not there yet). With offset B, you can define that height and it will be added to the base height in order to test the visibility of the roof top. The difference with an extrusion (adding a value to the base ...


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I was just having this exact same problem. The whole ArcMap program would crash as soon as I started to run Viewshed and no error was returned. I tried the tip offered by @PolyGeo to try a smaller dataset, so I clipped my DEM to a smaller extent and ran the tool again with the new, smaller raster. This time it immediately worked without a problem. (yay!) ...


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You need to set Drawing Priority for EACH layer in the scene. This is in the rendering tab of the layer properties. In some cases even this will not help, especially if you have any transparencies set. ArcScene simply cannot resolve some complex scenes. The work around is to modify your features in such a way that there is no possibility of overlap and ...



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