Sofistik question about height parametert in Revit

Hello there. I just joined it because I have a question and I saw a door family where a Sofistik parameter is analyzig the survey point and the project base point height. But I have no idea from what it takes those numbers exactly inside the family.

Specifically I want to make a manhole family that when tagged it shows the height of the upper part and the lowest part based on the survey point and then on the project base point.
Is that even possible in the first place?

Thank you for any kind of advice.