I m working with ArcMap 10.2.2.
I have one dataset with red deer observation (Excel Sheet) The data is joined to a polygon layer with administrative boudaries: It looks like this
Blue are the red deer observations counted with zero (means data is available and zero animals are counted) Yellow are areas where data didn't exist therefore I assigned the value -9999
I intersect my red deer data with a fishnet grid with cellsize 1000 - No problem but when updating the fishnet - I summarize the red deer data by calculating the average.
I m getting wrong values in exactly this grid cells
Does anybody know how to deal with this problem.