
Reverse Engineering example 2 



Suppose to have an old vertical declining dial with italic hours. Starting from an arbitrary cartesian reference system (horizontal x axis positive to the right, vertical y axis positive down) we take the following measurements:
Let's found the original design parameters of the dial.








aggiornato il venerdÃ¬ 06 marzo 2015 
(+ 52589 on May 1st 2012)