Hello, I've got a question that is not directly for Gstat, so apologies. Is it necessary that the data set (VR) you use to do a variogram study and after a conditional simulation, must be normally distribut ? If, yes what are the constraints ? -- Cordialy ---------------------------------------- Emmanuel POIZOT Cnam/Intechmer Digue de Collignon 50110 Tourlaville Tél : (33)(0)2 33 88 73 42 Fax : (33)(0)2 33 88 73 39 -----------------------------------------