[GRASSLIST:7980] Calculating "costdistance" using a DEM (aka 3-d distance)

[Jonathan Greenberg]

How do I go about calculating the shortest distance between two points given
a DEM?  I think this is called costdistance in ARC, but is there an
equivalent for GRASS?  Thanks!

--j

--

Jonathan A. Greenberg, PhD
NRC Research Associate
NASA Ames Research Center
MS 242-4
Moffett Field, CA 94035-1000
Office: 650-604-5896
Cell: 415-794-5043
AIM: jgrn307
MSN: jgrn307 at hotmail.com