Bug
Arcpy.Polygon produces a 0.0 value of an area from the coordinates used to create a polygon geometry object that are located in a smaller area.
| Bug ID Number | BUG-000149691 |
|---|---|
| Submitted | June 2, 2022 |
| Last Modified | March 19, 2025 |
| Applies to | ArcGIS Pro |
| Version found | 2.9.2 |
| Operating System | Windows OS |
| Operating System Version | 10.0 64 Bit |
| Status | As Designed |
Additional Information
When creating geometry objects via ArcPy, the spatial reference object must be set to enable high precision coordinates. For the code samples provided, adding `spatial_reference = WGS84` accomplishes this and allows the geometries to be interacted with as expected. Geometries created without a spatial reference are stored in a low precision mode which collapses geometries within short distances of one another. Note that properties like the area are rendered in the non-existent unit of 'square decimal degrees', and for real calculations a projection should be applied before calculation at this time.Workaround
- Create polylines from arcpy.Polygon with an array of points.
- Create a polyline feature class using Create Feature Class (Data Management) tool.
- Create a polygon feature class from polylines with the same Create Feature Class (Data Management) tool.
Steps to Reproduce
Bug ID: BUG-000149691
Software:
- ArcGIS Pro
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