AnsweredAssumed Answered

How to determine the changes between two polygon shapefiles of similar data

Question asked by WhitneyNewcomb on Nov 8, 2017
Latest reply on Nov 19, 2019 by bharold-esristaff

The city I work for gets its parcel data from the county once a month so we have several years of almost the same data. I want to be able to determine where changes occur between every new month. So what are the changes between September to October, October to November, etc. And by changes I mean any change in geometry (like parcel splits or merges) or changes in attributes (especially changes in ownership).


I've contacted ESRI about this and they weren't able to do a whole lot for me. 

Here's what I've tried so far:

I am able to find changes in geometry by using the Select by Location: Identical features and inverting the selection. 

This works fine but does not get me changes in attributes.

I would use the Feature Compare tool but this does not work as it requires the same number of rows in both tables - which I don't have. 


I also found an old arcgisscripting tool and converted it to arcpy and it worked with point datasets (but at a certain point in time the County changed how they did their parcel data and went to polygons only which the script does not work with).


So I'm at a loss for what to do now.


Does anyone have any advice for me?


Please let me know if there's any info I can give to help you help me.


-Whitney Newcomb