Agustin wrote: > I recall r.coarsen being a useful grass command. Why did it disappear? AFAIK a module by that name is not in the QGIS plugin, nor GRASS 4.3, 5.x, or 6.x. the only mention of it I could find is here: http://www.osgeo.org/pipermail/grass-user/1993-June/016966.html Hamish