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This was something I'd been thinking on for viewsheds, didn't realize Line of Sight was going to need z values. I included a global timer to find out if there is a particular step that slows it down. Its written to reduce by an offset factor, but I included comments on how to alter it to use variable heights from another raster instead, like a DEM. # ...


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This is to support JWallace answer: Please note decrease in volume with level rise equal (760-725) and (763.7-760) I bet that your (depth decrease)/(41.029-40.902) will result in some number with almost nothing after decimal point


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If I understand you correctly, this makes perfect sense. The Surface Volume tool is explicitly calculating a volume between the reference plane and your surface(s). As you move the reference plane, your volumes will change correspondingly. What doesn't change is the volume between your two surfaces (Year 1 and Year 2). This volume will always be the same, ...


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Just off the cuff.. you might try first extracting the endpoints of your line features, then extract the DEM elevation values for line endpoints and the manholes. 1) Feature Vertices To Points (Data Management): Turn your pipe line features into endpoints. Note the graphic describing your different point_location options. 2) Extract Values to Points ...


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The units of the graph and how to change them depend on which axis you're looking at. First, the horizontal units are the same as your current map projection. If you are using a Geographic coordinate system, the units will be degrees. If you're using a standard UTM projection, the units will be meters. The only way to change this use a different projection, ...



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