Hallo, is there some raster module, which would assign new values to raster, based on area size of grouped cells? Something like the Area module in Idrisi Kilimanjaro... Jachym -- Jachym Cepicky e-mail: jachym.cepicky at centrum.cz URL: http://les-ejk.cz GPG: http://www.fle.czu.cz/~jachym/gnupg_public_key/