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I have a shapefile with rectangular cells that i created with the function "create fishnet" and clipped it with a contour layer.

what i want to do is to add field to the attribute table that takes average values from a raster based on the cells of my shapefiles.

I created a table with the function "extract values to table" and join it to the attribute table of my shapefile.

the problem is that i have some null values in some cells.

  • Could you please provide more detail on the type of raster data you are using? A screenshot would help illustrate the issue. – Aaron Feb 27 '14 at 15:15
  • the raster data is the result of the simple kriging interpolation from a set of 226 point, and when i check the raster i don't have null value. – Geographic Feb 27 '14 at 15:31
  • Is your shapefile extending beyond the extent of the raster data? – Aaron Feb 27 '14 at 15:35
  • No, it's inside the raster – Geographic Feb 27 '14 at 15:38
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    Have you tried calculating zonal statistics as table?: resources.arcgis.com/en/help/main/10.2/index.html#//… – Aaron Feb 27 '14 at 16:05
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i generated the raster with "1" in cell size, so that when i execute "zonal statistics as table", arcgis can calculate the raster value that belongs to the same zone in my shapefile even the smallest polygon (with less than 1296 m² which correspond to 36 in default cell size)

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