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Subject: Re: Draw an arc when two locations are known
Date: Tue, 19 Oct 2010 03:29:04 +0000 (UTC)
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TideMan <mulgor@gmail.com> wrote in message <c1163acf-4e04-4327-b051-f6739fbed78f@r4g2000prj.googlegroups.com>...
> The (free) m_map mapping toolbox at:
> http://www.eos.ubc.ca/~rich/map.html
> has a map projection called gnomonic that transforms all lines on a
> map into great circle routes.
- - - - - - - -
  My impression is that, since Nikhil has taken the trouble to specify that the arc "radius is known", he is unlikely to be referring to the radius of the earth which is a more or less universally known quantity, and consequently the arcs in question would then not be great circle arcs.

Roger Stafford