I tried to use the "Compute statistics" tool histograms in order to get an idea how many pixels of which value are there in my map. However, the column "DN" in the Statistics results output clearly does not correspond to the values in the Cursor Location/Value box. E.g., in the statistics results output there is a DN -9999 with 26720 points, which does not exist as a value in my map. Likewise, DN -3 with 12 points does not exist, and the same for all DNs occurring in the statistics results. I am wondering what I am dealing with here, and how I can use Compute Statistics to get a histogram of the actual values present in the map? I would upload an example but don't seem to have sufficient permission to do so. Thank you.