Recall measured points from looped curve

[[Ma...]]

Hi,

i am looking for a way how to obtain circles from 2D curve which was measured as 16 rotary divisions.
I wanted to quickly scan a groove, then later obtain dimensions.

For width i was able to just intersect curve with a theoretical plane and report 2 point distance - which worked on division without problems.

For circles i have no luck.

No PCM available - any hints?

Thanks