Cliff Behrens asks: >How can one compute the distance between sites in a site_lists file with >GRASS 4.1? It would be nice to have a site program to do this, but you can do it with r.le.dist. Just convert the site file to a raster file, then run r.le.dist with the out= option. It will create a file containing the distances. Bill Baker bakerwl at uwyo.edu