My drafting program outputs a .dwf format file. In it, arcs are encoded as
(Circle 602331619,844923003 537072960 32715,65588)
where my so-far affirmed interpretation is
(Circle, X-center,Y-center Angle Unknown1,Unknown2).
The image for the arc is shown below (highlighted in Gold):
Hence, each arc has its center and radius given. Are the pair of points at the end the starting and ending angles?
If you take
(3.2715 rad,6.5588 rad), the output starts making sense. Is this correct?