least squares fitting of great circle to points on a sphere

Does anyone out there happen to know a simple algorithm for least squares fitting a great circle to a given set of lat/lon points on a sphere? Seems like it might not be a crazy thing to add to the library.

Thanks!
Zane

···

--
Zane Selvans
Amateur Earthling
http://zaneselvans.org
zane@...1923...
303/815-6866
PGP Key: 55E0815F