If the -c flag is used, r.reclass.area will skip the creation of a clumped raster and assume that the input raster is already clumped.
g.region raster=zipcodes -p
r.report zipcodes unit=h
# extract only areas greater than 2000 ha, NULL otherwise:
r.reclass.area input=zipcodes output=zipcodes_larger2000ha \
mode=greater value=2000
r.report zipcodes_larger2000ha unit=h
# reclass by substitutional removing of areas minor of 1000 ha
r.reclass.area input=zipcodes output=zipcodes_minor1000ha \
mode=lesser value=1000 method=rmarea
Last changed: $Date: 2015-11-20 07:00:52 +0100 (Fri, 20 Nov 2015) $