Hallo, description to v.voronoi and v.delaunay are the same: Create a Delaunay triangulation from an input vector of points or centroids. They should be different... Jáchym -- Jachym Cepicky e-mail: jachym.cepicky at centrum.cz URL: http://les-ejk.cz GPG: http://les-ejk.cz/gnupg_public_key/