BUG-000152701 for ArcGIS Pro

Bug ID Number	BUG-000152701
Submitted	September 30, 2022
Last Modified	September 19, 2024
Applies to	ArcGIS Pro
Version found	3.0
Operating System	Windows OS
Operating System Version	10.0 64 Bit
Status	As Designed

Additional Information

This is expected behavior. True curves or circular arcs are stored in a blob field inside the enterprise geodatabase (any RDBMS type). Densified or simple features are stored in the shape column instead to represent the true curve. As a result, querying the area or length of the shape column returns a different measurement than querying the true arc or curve itself (there is a slight difference). This is the same for other data like 3D length (querying the shape column only gives the 2D calculations).

Workaround

A user maintained attribute column can be created. Either the Add Geometry Attributes or Calculate Geometry Attribute tools can be used to populate the field. Refer to https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/add-geometry-attributes.htm or https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/calculate-geometry-attributes.htm for more information.
Arcade can also be used to obtain the values and then automatically populate a user-maintained field that stores the area and length via an attribute rule.