ACC → AGOL: Add unit override and scaling to support Plant 3D

[LoutKuiper_2]

Please add a unit override/scaling capability in the GeoBIM → AGOL integration so ACC-hosted 3D models authored in Autodesk Plant 3D (millimeters) can be correctly placed in AGOL projects using meters (e.g., RD New / EPSG:28992), without breaking the live ACC link.

Problem:

• Plant 3D models are typically authored in millimeters.
• AGOL scenes (e.g., RD New) expect meters.
• Current GeoBIM/AGOL pipelines don’t offer a unit conversion/scale option, causing misplacement.
• Workaround (FME scaling) breaks the live ACC connection—removing a key value of GeoBIM.

Proposed solution:

• Add a per-source “Units” setting and/or “Scale factor” in GeoBIM project/link configuration.
  • Example: Units = millimeters → auto apply scale 0.001 to positions/geometries.
• Optionally detect and honor authoring units from ACC/Plant 3D metadata.

[ACheuvront]

@LoutKuiper_2 with Plant3D being an AutoCAD based product, one way to solve this now would be to use a custom scaling in a world file. You may also need to supply the projection file for the coordinate system. The ArcGIS Pro documentation has information on how to apply and save the transformations as a .wld and .prj file. If the .wld and .prj files are in the ACC project folder, they will be applied automatically to the GeoBIM geoprocessing tools.

We will look into your idea and see if there is anything else we can do to improve the process.