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Arcgis Pro - Summarize Within

Question asked by dafiter Champion on Mar 12, 2020
Latest reply on Mar 24, 2020 by dafiter

I am trying to find out the average value of a nearby polygons using the Summarize within tool. 

The problem I am running into is that the average is not what I expect it to be if I average it manually. 


From the tool reference page Summarize Within—Help | Documentation 


The polygons used to summarize the features, or portions of features, in the input summary layer.

I think that it is using Portions of features within the 40 ft buffer I am using. I cannot find any documentation on when it uses a portion or all. I have tried getting the average of a polygon that has all of 4 buildings in it and it does not even get the average right when I would think that all the polygon would be used. At this point I don't know how it calculates "mean". 


The page defines: Mean—Calculates the average of all the points in each polygon.


Any suggestions?