[Geographiclib-announce] GeographicLib 1.52 (released 2021-06-22)

[Charles K. <cha...@gm...>]

Changes between 1.52 (released 2021-06-22) and 1.51 versions:

    * Add MagneticModel::FieldGeocentric and
      MagneticCircle::FieldGeocentric to return the field in geocentric
      coordinates (thanks to Marcelo Banik de Padua).

    * Document realistic errors for PolygonAreaT and Planimeter.

    * Geodesic routines: be more aggressive in preventing negative s12
      and m12 for short lines (all languages).

    * Fix bug in AlbersEqualArea for extreme prolate ellipsoids (plus
      general cleanup in the code).

    * Thanks to Thomas Warner, a sample of wrapping the C++ library, so
      it's accessible in Excel, is given in wrapper/Excel.

    * Minor changes
      + Work around inaccuracies in hypot routines in Visual Studio
        (win32), Python, and JavaScript.
      + Initialize reference argument to remquo (C++ and C).
      + Get ready to retire unused _exact in RhumbLine.
      + Declare RhumbLine copy constructor "= default".
      + Use C++11 "= delete" idiom to delete copy assignment and copy
        constructors in RhumbLine, Geoid, GravityModel, MagneticModel.
      + Fix MGRS::Forward to work around aggressive optimization leading to
        incorrect rounding.
      + Fix plain makefiles, Makefile.mk, so that PREFIX is handled
        properly.
      + Make cmake's GeographicLib_LIBRARIES point to namespace versions.

    * NOTE: In the next version (tentatively 2.0), I plan to split up
      the git repository and the packaging of GeographicLib into
      separate entities for each language.  This will simplify
      development and deployment of the library.

    * WARNING: The .NET version of GeographicLib will not be supported
      in the next version.