GeographicLib 2.0 (released 2022-05-06)

Charles Karney — Fri, 06 May 2022 17:35:38 -0000

Changes between 2.0 (released 2022-05-06) and 1.52 versions:

Remove non C++ implementations from this package. These are now
managed as separate packages. See
https://geographiclib.sourceforge.io/doc/library.html#languages
This allowed the cmake interface to be rationalized:
- Replace GEOGRAPHICLIB_LIB_TYPE by BUILD_SHARED_LIBS (a standard
  cmake variable) and BUILD_BOTH_LIBS.
- Remove COMMON_INSTALL_PATH and replace with variables to
  specify where various components are to be installed.
- Remove BUILD_NETGEOGRAPHICLIB.
- Remove legacy cmake config support (non-namespace).
- make exampleprograms does a separate cmake configuration to
  mimic how a user's program might find GeographicLib.
- find_package (GeographicLib) now sets and checks the value of
  GEOGRAPHICLIB_PRECISION.
- Improve the separation of end-user and maintain cmake code.
More careful treatment of +/-0d and +/-180d.
- These behave consistently with taking the limits
  - +/-0 means +/-eps as eps -> 0+
  - +/-180 means +/-(180 - eps) as eps -> 0+
- As a consequence, azimuths of +0d and +180d are reckoned to be
  east-going, as far as tracking the longitude with
  Geodesic::LONG_UNROLL and the area goes, while azimuths -0d and
  -180d are reckoned to be west-going.
- When computing longitude differences, if lat2 - lat1 = +/-180d
  (mod 360d), then the sign is picked depending on the sign of
  the difference.
- The normal range for returned longitudes and azimuths is
  [-180d, 180d].
Programs in directory tests now allow testing to extend beyond
invocations of the utility programs.
BUG FIXES:
- Fixed bug where in the solution of the inverse geodesic problem where
  with lat1 = 0 and lat2 = nan was treated as equatorial.
- Fixed roundoff corner case in geodesic area computation (only
  triggered with long double).
Minor changes in code:
- Use fmin, fmax, fabs instead of min, max, abs, where appropriate.
- Parameterize the conversion units for degrees, minutes, seconds as
  Math::qd, Math::dm, Math::ms.
- Ellipsoid::MinorRadius() has be renamed Ellipsoid::PolarRadius().
- Remove deprecated functions: XXX::MajorRadius, Utility::val, and
  placeholders (Math::cbrt, etc.) for C++11 math functions.
- Can specify the comment character in Utility::ParseLine.
- Rename various internal identifiers to avoid reserved names.
- Remove unused internal variable in RhumbLine.
- The documentation for EllipticFunction specifies restrictions on
  the arguments.
- Put GeodesicExactC4.cpp back into GeodesicExact.cpp.
Library file now called libGeographicLib.so, etc., instead of
libGeographic.so.
The .NET version of GeographicLib has been removed.

Recent changes to GeographicLib 2.0 (released 2022-05-06)

GeographicLib 2.0 (released 2022-05-06)