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Bug

When combining multiple polylines through the Union function in Python to create a multipart polyline within ArcGIS Pro, there is no designed order of the parts in the multipart polyline created.

ArcGIS Pro
Bug ID Number BUG-000175195
SubmittedMarch 20, 2025
Last ModifiedApril 20, 2025
Applies toArcGIS Pro
Version found3.4.2
Operating SystemWindows OS
Operating System VersionN/A
StatusAs Designed

Additional Information

The union of two geometries is a single geometry corresponding to the combination of both geometries, where anything within either of the original geometries is also part of the unioned geometry, but anything common to both geometries only exists once in the unioned geometry. The order of the input geometries to be unioned has no effect on the output.

Steps to Reproduce

Bug ID: BUG-000175195

Software:

  • ArcGIS Pro

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