Dear GRASS developers, it seems that there have been some licensing issues, which prevented r.cva to be included into GRASS, even if it has some technical merit over r.los [0]. Do these issues still exist? Best Regards, Peter Hopfgartner R3 GIS http://www.r3-gis.com [0] http://grass.itc.it/pipermail/grass5/2007-July.txt