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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

Red deer observation data

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

Fisnet grid cell intersect and outcome updated values

Does anybody know how to deal with this problem.

  • Use select by attributes to exclude no data polygons – FelixIP May 11 '17 at 2:56

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