I'm currently working on a land cover classification with Landsat 8 imagery. I already subjected the imagery to pre-processing (atmospheric and topographic correction) and I mosaiced two images. Now I want to apply a classification in ArcMap. I understand what I should do, but somehow I cannot mannage to create the statistics/histograms/scatterplots. When I click on the statistics, all values are zero. When I look at the properties of the raster layers on the other hand, I can see the statistics, calculated with the 'calculate statistics' tool. It doesn't create a histogram at all and the scatterplots are just 1 dot in the middle of the screen. Does somebody know what my problem is and how I can fix this?