[Geographiclib-announce] GeographicLib 2.1 (released 2022-06-09)
Geographic library
Brought to you by:
karney
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From: Charles K. <cha...@gm...> - 2022-06-09 15:08:39
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Changes between 2.1 (released 2022-06-09) and 2.0 versions:
* Improve the accuracy of the area calculations in GeodesicExact
and the Planimeter utility with the -E option. This now gives
full double precision accuracy for b/a in [0.01, 100] or f in
[-99, 0.99]. (Previously the range for full accuracy was b/a in
[0.5, 2].) The method involves a direct computation of the
Fourier series for the integrand of area integral which then
allows the integral to be evaluated.
* Add a new class DST for doing discrete sine transforms. This is
mainly for "internal" use, to compute the area in GeodesicExact.
Internally, this uses the kissfft package by Mark Borgerding.
* Fix various warnings from Visual Studio about arithmetic involving
enums.
* Minor improvement in the logic for the geodesic inverse problem
to address a slow down that can occur with
GEOGRAPHICLIB_PRECISION = 5 due to the time it takes to
calculate, for example, sin(10^(10^8)) accurately.
--
Charles Karney <ch...@ka...>
Princeton, NJ
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