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Bug

ArcGIS Maps SDK for JavaScript - simplifyOperators.isSimple() method outputs True for polyline graphics that self-intersect when it should output False

ArcGIS Maps SDK for JavaScript
Bug ID Number BUG-000174679
SubmittedMarch 1, 2025
Last ModifiedJuly 7, 2025
Applies toArcGIS Maps SDK for JavaScript
Version found4.32
Operating SystemWindows OS
Operating System Version10.0 64 Bit
StatusAs Designed

Additional Information

The SDK documentation for geometryEngine.simplify(), geometryEngineAsync.simplify() and simplifyOperator, at versions 4.31 and prior, incorrectly stated that these methods treated self-intersecting polylines as not simple. The esri/rest/geometryService simplify() method also uses the same functionality internally. We are in the process of updating the documentation to clarify that these methods are non-OGC compliant. This means these methods treat self-intersecting polyline paths as simple (simple = true). Using these methods to simplify polylines will not break up the polyline paths at self-intersection points. An important clarification: these methods do treat self-intersecting polygon rings as not simple (simple = false). We are considering adding an OGC-compliant operator to accommodate this use case.

Workaround

Depending on the use case, a possible workaround is to utilize the Arcade function IsSelfIntersecting, which can be found at this link: https://developers.arcgis.com/arcade/function-reference/geometry_functions/#isselfintersecting. You can implement this function through the following resource: https://developers.arcgis.com/javascript/latest/api-reference/esri-arcade.html.

Steps to Reproduce

Bug ID: BUG-000174679

Software:

  • ArcGIS Maps SDK for JavaScript

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