I see in GRASS 7 that r.surf.idw2 does not work in a latlon region. It recommends using r.surf.idw.
But r.surf.idw doesn’t see to do anything either. It runs with no errors but does not produce an interpolated map.
Michael
C. Michael Barton
Director, Center for Social Dynamics & Complexity
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State University
voice: 480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu