Volume calculations are generated from all voxels either partially or fully included in the Isosurface. A voxel is fully contained if all of the eight corner lattice points have a component value greater than or equal to the Isovalue. A voxel is partially contained if one or more corner lattice points have a component value greater than or equal to the Isovalue. The total Volume >= isovalue is the sum of the individual volumes from these voxels. Results are provided in cubic units based on the units of the input grid file. To make volumetric sense, the X, Y, and Z units should be the same.
Updated April 30, 2018