Basically I want to select line features based on a polygon feature, then return a value that is the sum of all the features in a field that is within the selected set of line features. Then do this for say, a hundred more feature classes. I figured there would be a tool, called GetSum or something similar that would do this but did not see it in the Help. I've explored using Summary Statistics, but that returns a table, not a simple value. Here is what I've got. Ideas?# Create a list of all the polygon feature classes zonePolys = arcpy.ListFeatureClasses("Zone*") for fc in zonePolys: arcpy.AddField_management(fc,"SumOfValues","LONG") arcpy.MakeFeatureLayer_management("OriginalLayer", "OriginalLayer_Lyr") arcpy.SelectLayerByLocation_management("OriginalLayer_Lyr","INTERSECT",fc) # Calculate the sum of the values in the selected features in OriginalLayer_Lyr SumValues = ?? # Take the sum value of the line features field and populate the polygon layer's new SumOfValues field with it arcpy.CalculateField_management(fc,"SumOfValues",SumValues)
