Setting "-9999" as a 'NoData' Value (Changes Minimum Value)

Discussion created by kpurdon on Apr 12, 2011
Latest reply on Jan 11, 2012 by earoberts

We have a raster dataset of sub-glacial elevation that is masked out to a non-regular extent for accuracy reasons. However the modelers want a regular mask around the data so we created one using NoData values of -9999. However doing this sets the new minimum value of the raster obviously to -9999. Is there a way to tell Arc that -9999 is the "NoData" value? Or should we actually use the "SetNull" command to set the cells to the value "NoData" or would this create issues in doing calculations/merges/etc... with the rasters?