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Calculation within raster images - areas zoned by polygon-shapefile

Question asked by anass2012 on Jul 24, 2012
Latest reply on Jul 26, 2012 by JSwain-esristaff
I like to calculate the mean raster value of areas in a raster image. The boundaries of the areas are defined by polygons in a separate shapefile. The result of the mean value should record in an attribute column within the shapefile. Finally, I like to convert this mean value for every polygon area by a simple equation and record the result once again in a separate attribute column within the shapefile. I hope my problem is formulated understandably!

Thanks for any help,