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What is calibration with two points?

Posted: Tue Nov 03, 2009 6:48 pm
by steenkh
I have difficulty understanding the concept of calibration with two known points (top-left and bottom-right). The manual is rather sparse on the subject.

Does it mean I will have to define the two corner points and find their coordinates somehow?

What happens if I choose two other points? Will I be able to move outside the rectangle defined by the two points?

What are the limitations of the method? I presume it only works with certain map projections.