Jmol/Depth from surface
The atom property surfacedistance in Jmol is each atom's distance from the surface of the macromolecule. The units of surfacedistance are Ångstroms. You can report the average, minimum, or maximum surfacedistance of a group of atoms. Atoms, cavity/pocket/tunnel isosurfaces, and other objects can be colored by distance from the surface.