Thanks Markus. I did test with r.mapcalc novo_raster = if"(mi flat_map==0.0234)", but the map is not appropiate. I know the area of value (0.0234), but is not is equal in the novo_raster.
El 13/04/2011, a las 17:27, Markus Neteler escribió: > 2011/4/13 Gaspar Reyes Póndigo <go...@hotmail.com>: >> Hello, Dear grass_user. My first forum participation in the grass_user list >> email. > > Welcome! > >> How to extract values of map raster with r.mapcalc? I need make new map >> raster based on specific value of other raster. > > Please take a look at the if() conditions: > > http://grass.osgeo.org/grass64/manuals/html64_user/r.mapcalc.html > > Therein is also a section EXAMPLES. > > Markus >
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