[Proj] rhumb lines + arbitrary precision arithmetic

Charles Karney charles.karney at sri.com
Sun Aug 10 16:49:05 EST 2014

I've released version 1.37 of GeographicLib.  See


A couple of items might be of interest to the readers of this list.

(1) Classes and a utility for computing rhumb lines.  For details, see


(2) Support for high precision arithmetic.  A compilation option is
provided to allow linking against Boost (for quad precision) or MPFR
(for arbitrary precision).  Thanks to C++'s operator overloading this
entailed minimal changes to the code itself.  For details, see


Charles Karney <charles.karney at sri.com>
SRI International, Princeton, NJ 08543-5300

Tel: +1 609 734 2312
Fax: +1 609 734 2662

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