Anchor points with OSGB to create Integrated Mesh Scene Layer

MaryWindsor1

I am trying to using the Create Integrated Mesh Scene Layer Package using the OSGB format exported from Bentley Systems Context Capture. However, I was not given any anchor points. While the version of ArcPro I'm using (2.2) says anchor points are optional, the tool is not letting me run it unless an anchor point is provided. 

I'm not finding good documentation about anchor points myself. Would someone please explain why an achor point would be needed in this case and how I can go about determining the center point of the dataset? It sounds to me like it should be something Context Capture should be providing as an output in addition to the OSGB dataset?

I would like to at least be able to run the tool in ArcPro without an anchor point to see the output, even if it wouldn't be in the right location.

Thanks!

MaryWindsor1

As a follow up if anyone is wondering, Bentley CC provides the anchor point information within the metadata.xml output with the OSGB dataset