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To get a coloured picture of the AHN DEM, add a NODATA value of -2147483647 in the Transparency tab. In the Style tab, load the Extrema ( not the default 2% to 98%) and select one channel pseudo colour. With the Spectral colour ramp [x] inverted, the output looks like this: For the viewshed, I clipped the data to my area of interest and converted the ...


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Well, big bros don't like lengthy chats on this forum. We are left with 2 options. My one - make it an answer, yours - accept it before reading further. In short you have to modify DSM inside building outline. Use Geoprocessing - Environment _ Spatial Extent to set it to DSM. Use Geoprocessing - Environment _ Raster Analysis - Cell Size to set it same as ...


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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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