Hi, 2011/12/6 Markus Metz <markus.metz.giswork at googlemail.com>: > For categorical data you could use r.grow.distance in=mymap > value=mymap_filled which assigns the nearest non-NULL value to a NULL > cell and is pretty fast. works, thanks! Martin -- Martin Landa <landa.martin gmail.com> * http://geo.fsv.cvut.cz/~landa