Hi I have a raster values are: null 1 3 24 27 etc... I need null = 0 As i want to add rasters together so I want to do null=0 I'm sure this is simple Thank you Gary -- View this message in context: http://n2.nabble.com/null-to-equal-zero-tp4755345p4755345.html Sent from the Grass - Users mailing list archive at Nabble.com.