In enterprise and file geodatabases, the Shape.STArea() and Shape.STLength() fields are automatically calculated after modifications. But for a lot of local government folks in the US working with land-related information, "acres" is a more important geometric measure than "square feet". But to keep this user-created field current after modifications, it always has to be recalculated manually or programmatically. Forgetting to recalculate can lead to erroneous assessment results. It would be nice if the automated geometry update of the Shape.STArea() field could be applied to other geometry fields in the geodatabase as well.
This is long overdue.
This is still sorely needed in 2021. Come on ESRI developers! You can do it!
As Richard Fairhurst pointed out in 2016, this has been possible with Attribute Assistant for a long time.
The new technology to accomplish this is Attribute Rules. https://pro.arcgis.com/en/pro-app/latest/help/data/geodatabases/overview/an-overview-of-attribute-ru...
Set up an attribute rule with a conversion calculation from the feature class' unit into acres:
Here is a related blog: https://www.esri.com/arcgis-blog/products/arcgis-pro/data-management/get-to-the-point-automatically-...
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