Original User: patflo

Hello i`ve got a problem doing the zonal statistic calculation with a layer and a shape-file. My layer is a temperature layer for europe and my shapefile is a polygon shapefile from Germany. When i want to do the MEAN calculation for every polygon in the shapefile it gives me MEAN-Values for the temperature of -1100 degrees. I think the problem is that some of the polygons are not fully covered by the raster layer? Has someone an idea how to get the correct values?

in the attachement i put a pic of the shapefile with the raster layer and the table.

Thanks in advance for your help

Hello i`ve got a problem doing the zonal statistic calculation with a layer and a shape-file. My layer is a temperature layer for europe and my shapefile is a polygon shapefile from Germany. When i want to do the MEAN calculation for every polygon in the shapefile it gives me MEAN-Values for the temperature of -1100 degrees. I think the problem is that some of the polygons are not fully covered by the raster layer? Has someone an idea how to get the correct values?

in the attachement i put a pic of the shapefile with the raster layer and the table.

Thanks in advance for your help

Resampling the raster to a smaller cellsize may help.

Think about the ignore_nodata-option.

Read the help:

http://help.arcgis.com/de/arcgisdesktop/10.0/help/index.html#//009z000000w8000000.htm