BUG-000136402 for ArcGIS Pro

Bug ID Number	BUG-000136402
Submitted	December 23, 2020
Last Modified	June 5, 2024
Applies to	ArcGIS Pro
Version found	2.6.2
Operating System	Windows OS
Operating System Version	N/A
Status	Non-Reproducible

Additional Information

ArcGIS Pro 2.7 has resolved some issues with Acres unit conversion. This issue compares Geodesic area calculated by Calculate Geometry Attributes tool with Planar area calculated by Measure Features interactive tool, which is inappropriate and the values will almost always be different (the planar area does not represent real area on the Earth or geoid rather a Cartesian approximation based on a projected coordinate system). The Calculate Geometry Attributes tool in ArcGIS Pro 2.7 supports Planar area computation for the supplied data, and produces a value that matches exactly the Measure Features interactive tool. The Geodesic area calculation is different from the Geodesic option of the Measure Features interactive tool, as the Calculate Geometry Attributes tool uses a Shape-preserving geodesic method to more accurately represent the shape while calculating the area by including additional vertices, as described conceptually in the links below: https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/project.htm https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/calculate-geometry-attributes.htm https://pro.arcgis.com/en/pro-app/latest/arcpy/classes/geometry.htm

Workaround

Run the Calculate Field tool with the following expression '!shape.area@acres!' to get correct results that match the Measure tool. The following documentation describes the Calculate Field tool examples for calculating geometry unit conversions: https://pro.arcgis.com/en/pro-app/tool-reference/data-management/calculate-field-examples.htm.