topic Re: Repair Self Intersecting Polygon in a Feature Class in ArcGIS Pro Questions

Repair Self Intersecting Polygon in a Feature Class

Ed_ — Tue, 10 Mar 2026 16:11:13 GMT

Is there a way to auto repair self intersections within in a polygon of a feature class? I tried the Repair Self Intersection and Repair Geometry tool but both the tools do not fix the intersecting vertices.

Re: Repair Self Intersecting Polygon in a Feature Class

DanPatterson — Tue, 10 Mar 2026 16:08:05 GMT

It is hard to see what you are trying to show since you are using an outline, I presume

Try using a polygon fill symbology so one can see whether the areas are being split into two parts with clockwise order or whether one is being converted into a hole (ccw order). (opening up the table and selecting bits might help figure out what is going on as well

Re: Repair Self Intersecting Polygon in a Feature Class

Ed_ — Tue, 10 Mar 2026 16:11:55 GMT

Hi Dan, I have updated the attached image.

Re: Repair Self Intersecting Polygon in a Feature Class

DanPatterson — Tue, 10 Mar 2026 16:43:36 GMT

from a snip of your image, click on 1 then on 2 when the table is open

1 should obviously be inside the polygon

2 may be a hole in the polygon or select the area outside the polygon

Which is it?

If it is a hole that you want removed, then

Eliminate Polygon Part (Data Management)—ArcGIS Pro | Documentation

might do the trick for the whole featureclass, with unpredictable results, otherwise you are left with standard editing tools to convert holes to polygons and/or splitting the geometry at a point.

Buffering outward by an amount, then reversing the buffer inward by the same amount is an alternative, but requires several steps, usually fewer than individual edits, but the problem is that the "amount" of the buffer doesn't guarantee that all will be removed.

Repair Self Intersection (Topographic Production)—ArcGIS Pro | Documentation

dumping the parts might be a better option if you want to get rid of the "holes" or revisiting how the geometry was created in the first place