I have been trying to calculate the volume between two TIN surface's using the surface volume tool (ArcGIS 10.1).
I have set the plane height to 100 (far above the highest point on the TIN, and keep this value the same for both TIN's) but when I change this to say 150, the volume difference between the TIN's changes. Should the volume difference not be the same (although I appreciate the actual volumes will increase proportionally to the plane height change!)??
Many thanks in advance,
Alex