I am a very new GIS user using ArcMap 10. I have a raster layer of tree canopy that I have clipped so that the layer is in a polygon that is a circle with a 2km radius.
I have done this for four circles and I am trying to compare the tree canopy across the four circles. Something like a density or % area covered would be perfect.
The problem is... the tree canopy raster layer attribute table only has counts for where the canopy is... and no counts for where it is not. I could get a % cover (for comparisons across the four circles) if I knew what the count of the no tree canopy cells was, but this information is absent. It is almost as if the raster layer is like a point layer, but I cannot count each cell as a point. I hope this makes sense. I am completely lost.. any help would be appreciated!
Thanks in advance!