Hi, Someone mentioned in aposting that he is using tkl-tk GRASS. Where can I get this software? Max -- Max Pilgram Statistics in Ecology, Vegetation Modelling __ _ ___ Technical University Munich-Weihenstephan |_ /_|| | | e-mail: max at pollux.edv.agrar.tu-muenchen.de | / |http://www.edv.agrar.tu-muenchen.de/dvs/persons/max/max.html