How to profile this feature?

[[Pe...]]

I have an irregular shaped boss that protrudes .020 inch from the surrounding surface.  It has a .030 radius around it, meaning it has no vertical edges.  Assuming A is the surrounding flat surface, and B and C are some arbitrary features that make for a good contrained datum reference, how does one begin to profile such a shape?

 

I dont think scanning around the outer perimeter will work since I have no true edge to work with and it would be forcing the probe at a weird angle.  And also I dont trust the machinist to not also put an edgebreak on the feature which further limits the scanning area.  My initial thoughts were that I could measure the .030 radii in many places then make intersection points with the top surface.  However, I came across a snag that curves cannot recall intersection points to profile them.

Edit:  The "poor man's solution" I found is that I can make a theoretical point which recalls the actual XYZ from each intersection with formula then uses formula to overwrite the nominal value to the real nominals.  Then repeat that 67 times to which is how many intersections I have total, assign a profile to each of them, then take a maximum result of the profiled points for one simple result.  Is there is a better way?

Edited yesterday at 04:28 PM

[[Ma...]]

Do you have a model and curve option?

Your calout is for surface profile, but i have difficulties with imagining your part and what is needed to be measured.

I would say - better this would be evaluated on optical machine with small measured volume - like MV50 or MV100 on ATOS.