[PyMOL] obtaining coordinates of solvent-surface points

Hello:
Im new at pymol and would like to obtain the
coordinates of the dots that make up the
solvent-accessible surface.  I can obtain the vertices
using cmd.get_povray()[1], but that will give me a
list of coordinates of open cylinders with spheres at
either end.  Perhaps these sphere and cylinders are so
small that I could use any of them as the coordinates
for the surface dot. Or, would it be more exact to use
the midpoint of the cylinder?  Any suggestions?

Thanks,
John 


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