I'm using the raster calculator in ArcGIS10 to sum 4 maps that have each been reclassified to values 0 or 1. So for the final output, the possible range of values is 0-4. However, the actual range in the output is only 0-3 (none of the pixels actually have the maximum value). Therefore, the final output only contains features for values 0-3 and I can't seem to add a row for value 4 into the attribute table. The final legend is also limited to 0-3 which is misleading because the maximum possible value is really 4.