DESCRIPTION
r.sum sums up the raster cell values.
For example, it can be used to summarize the population
of a country. Using a raster MASK, raster areas can be
easily selected for the summary.
SEE ALSO
r.surf.area
AUTHOR
Bill Brown, UIUC GIS Laboratory
Last changed: $Date: 2008-05-16 12:09:06 -0700 (Fri, 16 May 2008) $