Quote Originally Posted by passel View Post
How do you calibrate them?

Really need to what your frame of reference is, and what does calibration do, calibrate to what?
The calibration is knowing the exact point locations of a single point, mapped to both systems.

Ex: Point 1 = 9,7 on system 1 and 6.5,11.2 on system 2.
Point 2 = 41,27 on system 1 and 43.2, 21.4 on system 2.

These coordinate systems *are* frames of reference (literally). Two points are all you need to understand their relation.