I have recently started with Arc Gis. I am trying to change the format of the symbology of a raster from Streched to Classified. ArcGis 9.3 opens the missage "Unique histograms do not exists. Do you want to compute unique values?". I have changed the original number of unique values to 100000000 to be sure that ArcGis can construct the atrribute tables. But although this, the program cannot change from Streached to Classified. Can anybody help me to solve this?
