I am using the Zonal Statistics as Table tool in ArcMap 10.1 to compute the sum of raster cell values (brown scale in below image) in a given set of polygons (red in below image).
For an unknown reason, the output table is not including all the levels of the polygon file I am trying to get information about. I tried on a smaller set of polygons (as these polygons are buffers) and did not have the same problem. I have indeed asked the Zonal Statistics tool to ignore 'Nodata' (as shown in blue), so I am not sure why this is happening. Suggestions?