Hi all, could you please tell me the address where I can find the r.watershed and r.mapcalc tutorials? Thank you for your help! Ezzedine Sdiri M.Sc. Student MAICh - Mediterranean Agronomic Institute of Chania Chania - Crete (Greece) BOX 85, GR-73100 tel: 0030/821/81151 fax: 0030/821/81154