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[infblnpf <>]

Thank you for the information.

General circular arcs unfortunately help me a little only, since I have to
work with great circles (or segments of those) only.

What I meant by the geometric operations was the following: Lets say I would
like to draw a line from Seattle to Moscow. For each my intention was to
simply define the cities' coordinates and the line is drawn for me. As far
as I understand I would though have to define a plane (or other sphere) in
CGAL first. But this second object is based on Euclidean space, which means,
that I would first have to determine the Euclidean coordinates from my
geographic coordinates. This would still leave me with more geometric
operations necessary.

Best regards
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