Self-Intersecting Detect and Fix using SimplifyAsFeature

MKa — Tue, 16 Mar 2021 16:04:34 GMT

I have discovered that some of the polygons that users are bringing into my system and creating a new object from have self intersections. I need to be able to first detect if a self intersection exists, and if it does then repair it automatically.

Is SimplifyAsFeature the best method to do this with for both detection and fixing?

protected Geometry FixSelfIntersections(Geometry inGeometry) { //I want to see if it has self intersections FIRST?? bool isSelfIntersecting = NEED TO FIND FIRST??; //Fix if it has intersections if (isSelfIntersecting) { inGeometry = GeometryEngine.Instance.SimplifyAsFeature(inGeometry, true); } return inGeometry; }

Re: Self-Intersecting Detect and Fix using SimplifyAsFeature

NarelleChedzey — Tue, 16 Mar 2021 16:34:53 GMT

Hi,

You can use the GeometryEngine.Instance.IsSimpleAsFeature method to determine whether the feature is "simple". (ie does not have self-intersections). If the feature is not simple then you would call GeometryEngine.Instance.SimplifyAsFeature to simplify it.

https://pro.arcgis.com/en/pro-app/latest/sdk/api-reference/#topic15566.html

The Geometry Concepts page has a section describing these two methods

https://github.com/Esri/arcgis-pro-sdk/wiki/ProConcepts-Geometry#simplifyasfeature-and-issimpleasfeature

Thanks

Narelle

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Self-Intersecting Detect and Fix using SimplifyAsFeature

Re: Self-Intersecting Detect and Fix using SimplifyAsFeature