I have a problem using zonal statistics in ArcGIS.
My raster contains values/data with 30m cells.
I had several vector layers, containing administrative subdivisions of Belgium. I have converted the vector layers to raster data with the Polygon to Raster tool. I used the cell center assignment and used the same cell-size than that of my value raster data.
Each time I use zonal statistics, 2 zones are missing. I don't understand why ?
It's not a size problem as these are not necessary the smallest zones.
I tried the same procedure using another raster data sets for defining the zones, and the same occurs at a different location.