topic Re: Find the percentage of polygon that overlaps other polygon in Geoprocessing Questions https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647229#M21636 <HTML><HEAD></HEAD><BODY><P>See if the Tabulate Intersection tool will give you what you need.</P></BODY></HTML> Wed, 22 Feb 2017 17:42:58 GMT BruceHarold 2017-02-22T17:42:58Z Find the percentage of polygon that overlaps other polygon https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647226#M21633 <HTML><HEAD></HEAD><BODY><P>Hello! I two polygon layers - one of which I need to find the percentage of how much of those polygons are outside of the much larger polygon (Places shapefile to MSA shapefile). Thank you!</P></BODY></HTML> Wed, 22 Feb 2017 17:14:32 GMT https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647226#M21633 LindseyWinn 2017-02-22T17:14:32Z Re: Find the percentage of polygon that overlaps other polygon https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647227#M21634 <HTML><HEAD></HEAD><BODY><P>I can get the area of each polygon - I run the insect tool and then calculate area. But then how do I show which ones fall outside of the main polygon and the percentage of each one? So ideally, I want every polygon that falls inside my larger polygon to be labeled as "100%" and all others that fall outside of it to be labeled 50%, 10%, and so on. Does this make sense?</P></BODY></HTML> Wed, 22 Feb 2017 17:22:24 GMT https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647227#M21634 LindseyWinn 2017-02-22T17:22:24Z Re: Find the percentage of polygon that overlaps other polygon https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647228#M21635 <HTML><HEAD></HEAD><BODY><P>Add a field called OriginalArea of double type; calc it to equal the area.&nbsp; Then perform your geoprocessing.&nbsp; You'll end up with a new area, which when you divide it by OriginalArea will give your percentage.</P></BODY></HTML> Wed, 22 Feb 2017 17:33:12 GMT https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647228#M21635 JoeBorgione 2017-02-22T17:33:12Z Re: Find the percentage of polygon that overlaps other polygon https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647229#M21636 <HTML><HEAD></HEAD><BODY><P>See if the Tabulate Intersection tool will give you what you need.</P></BODY></HTML> Wed, 22 Feb 2017 17:42:58 GMT https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647229#M21636 BruceHarold 2017-02-22T17:42:58Z Re: Find the percentage of polygon that overlaps other polygon https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647230#M21637 <HTML><HEAD></HEAD><BODY><P>Excellent, thank you! I'm almost there. I calculated the original area, then ran the intersect tool, then calculated the new area. Then I created a new field and used the field calculator to computer (OriginalArea/NewArea) * 100 to get the percentage. The polygons that are completely inside are labeled as 100%, but the polygons that are 50%, 10%, etc. inside the polygon have weird numbers (for example, one of the slivers that is inside the polygon is calculated as&nbsp;1328227643.9 (the new area was calculated as 0.00003). I know it's just a matter of my calculations, but how do I fix that? Thanks!!</P></BODY></HTML> Wed, 22 Feb 2017 19:17:16 GMT https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647230#M21637 LindseyWinn 2017-02-22T19:17:16Z Re: Find the percentage of polygon that overlaps other polygon https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647231#M21638 <HTML><HEAD></HEAD><BODY><P>It should be NewArea/OriginalArea *100. <IMG src="https://community.esri.com/legacyfs/online/emoticons/happy.png" /></P></BODY></HTML> Wed, 22 Feb 2017 19:25:50 GMT https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647231#M21638 DarrenWiens2 2017-02-22T19:25:50Z Re: Find the percentage of polygon that overlaps other polygon https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647232#M21639 <HTML><HEAD></HEAD><BODY><P>Ahhhh yes - THANK YOU!</P></BODY></HTML> Wed, 22 Feb 2017 20:19:16 GMT https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647232#M21639 LindseyWinn 2017-02-22T20:19:16Z Re: Find the percentage of polygon that overlaps other polygon https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647233#M21640 <HTML><HEAD></HEAD><BODY><P><EM><STRONG>You'll end up with a new area, which when you divide it by OriginalArea will give your percentage.</STRONG></EM></P><P></P><P>And what Darren said.....</P><P></P><P></P><P><A href="https://community.esri.com/people/lewinn">lewinn</A>‌</P></BODY></HTML> Wed, 22 Feb 2017 20:22:51 GMT https://community.esri.com/t5/geoprocessing-questions/find-the-percentage-of-polygon-that-overlaps-other/m-p/647233#M21640 JoeBorgione 2017-02-22T20:22:51Z