I am trying to calculate the volume of several TINs using the 3D Analyst of ArcGIS 10.5. My data can be found here: https://drive.google.com/open?id=1ERFdsqDGLH1a_FbxwawE_gPm0Au0Q9vT
For a start, I clipped the TIN data set to just one TIN and calculated the volume with
reference plane = "BELOW" and
height field = "None", which in my understanding means that ArcGIS takes the highest point of the TIN. The calculated volume seemed to check out.
However, when I take my whole data set (with about 300 TINs) through the same process the calculated volume for each TIN gets unreasonably large while the area only slightly differs.
Do I have to provide an input to the height field?
If I understand correctly, it would have to come from the attribute table of the input feature class. But I haven't figured out a way to extract the highest point of a TIN let alone save it as a new column in the attribute table of my shapefile.
Am I on the right track or do I need to do something completely different?