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: 2007-05-29 13:42:23 +0200 (Tue, 29 May 2007) $