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
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