2013/1/29 Marcello Benigno <benigno.marcello at gmail.com>: > http://www.ing.unitn.it/~grass/docs/tutorial_62_en/htdocs/esercitazione/dtm/dtm4.html Note also the updated version: http://www.ing.unitn.it/~grass/docs/tutorial_64_en/htdocs/esercitazione/dtm/dtm4.html Markus