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NEWS
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A reverse chronological list of changes to GeographicLib
For more information, see
http://geographiclib.sourceforge.net/
The current version of the library is 1.43.
Changes between 1.43 (released 2015-05-23) and 1.42 versions:
* Add the Enhanced Magnetic Model 2015, emm2015. This is valid for
2000 thru the end of 2019. This required some changes in the
MagneticModel and MagneticCircle classes; so this model cannot be
used with versions of GeographicLib prior to 1.43.
* Fix BLUNDER in PolarStereographic constructor introduced in version
1.42. This affected UTMUPS conversions for UPS which could be
incorrect by up to 0.5 km.
* Changes in the LONG_NOWRAP option (added in version 1.39) in the
Geodesic and GeodesicLine classes:
+ The option is now called LONG_UNROLL (a less negative sounding
term); the original name, LONG_NOWRAP, is retained for backwards
compatibility.
+ There were two bad BUGS in the implementation of this capability:
(a) it gave incorrect results for west-going geodesics; (b) the
option was ignored if used directly via the GeodesicLine class.
The first bug affected the implementations in all languages. The
second affected the implementation in C++ (GeodesicLine and
GeodesicLineExact), JavaScript, Java, C, Python. These bugs have
now been FIXED.
+ The GeodSolve utility now accepts a -u option, which turns on the
LONG_UNROLL treatment. With this option lon1 is reported as
entered and lon2 is given such that lon2 - lon1 indicates how
often and in what sense the geodesic has encircled the earth.
(This option also affects the value of longitude reported when an
inverse calculation is run with the -f option.)
+ The inverse calculation with the JavaScript and python libraries
similarly sets lon1 and lon2 in output dictionary respecting the
LONG_UNROLL flag.
+ The online version of GeodSolve now offers an option to unroll the
longitude.
+ To support these changes DMS::DecodeLatLon no longer reduces the
longitude to the range [-180deg, 180deg) and Math::AngRound now
coverts -0 to +0.
* Add Math::polyval (also to C, Java, JavaScript, Fortran, python
versions of the library; this is a built-in function for
MATLAB/Octave). This evaluates a polynomial using Horner's method.
The Maxima-generated code fragments for the evaluation of series in
the Geodesic, TransverseMercator, and Rhumb classes and MATLAB
routines for great ellipses have been replaced by Maxima-generated
arrays of polynomial coefficients which are used as input to
Math::polyval.
* Add MGRS::Check() to verify that a, f, k_UTM, and k_UPS are
consistent with the assumptions in the UTMUPS and MGRS classes.
This is invoked with GeoConvert --version. (This function was added
to document and check the assumptions used in the UTMUPS and MGRS
classes in case they are extended to deal with ellipsoids other than
WS84.)
* MATLAB function mgrs_inv now takes an optional center argument and
strips white space from both beginning and end of the string.
* Minor internal changes:
+ GeodSolve sets the geodesic mask so that unnecessary calculations
are avoided;
+ some routines have migrated into a math class for for python,
Java, JavaScript libraries.
* A reminder: because of changes in the installation directories for
non-Windows systems introduced in version 1.42, you should remove
the following directories from your system:
+ ${CMAKE_INSTALL_PREFIX}/share/cmake/GeographicLib*
+ ${CMAKE_INSTALL_PREFIX}/libexec/GeographicLib/matlab
Changes between 1.42 (released 2015-04-28) and 1.41 versions:
* DMS::Decode allows a single addition or subtraction operation, e.g.,
70W+0:0:15. This affects the GeoCoords class and the utilities
(which use the DMS class for reading coordinates).
* Add Math::norm, Math::AngRound, Math::tand, Math::atan2d,
Math::eatanhe, Math::taupf, Math::tauf, Math::fma and remove
duplicated (but private) functionality from other classes.
* On non-Windows systems, the cmake config-style find_package files
are now installed under ${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}
instead of ${CMAKE_INSTALL_PREFIX}/share, because the files are
architecture-specific. This change will let 32-bit and 64-bit
versions coexist on the same machine (in lib and lib64). You should
remove the versions in the old "share" location.
* MATLAB changes:
+ provide native MATLAB implementations for compiled interface
functions;
+ the compiled MATLAB interface is now deprecated and so the
MATLAB_COMPILER option in the cmake build has been removed;
+ reorganize directories, so that
o matlab/geographiclib contains the native matlab code;
o matlab/geographiclib-legacy contains wrapper functions to mimic
the previous compiled functionality;
+ the installed MATLAB code mirrors this layout, but the parent
installation directory on non-Windows systems is
${CMAKE_INSTALL_PREFIX}/share (instead of
${CMAKE_INSTALL_PREFIX}/libexec), because the files are now
architecture independent;
+ matlab/geographiclib is now packaged and distributed as MATLAB
File Exchange package 50605 (this supersedes three earlier MATLAB
packages);
+ point fix for geodarea.m to correct bug in area of polygons which
encircle a pole multiple times (released as version 1.41.1 of
MATLAB File Exchange package 39108, 2014-04-22).
* artifactId for Java package changed from GeographicLib to
GeographicLib-Java and the package is now deployed to Maven Central
(thanks to Chris Bennight for help on this).
* Fix autoconf mismatch of version numbers (which were inconsistent in
versions 1.40 and 1.41).
* Mark the computation of the gradient of the geoid height in the
Geoid class and the <a href="GeoidEval.1.html">GeoidEval</a> utility
as deprecated.
* Work around the boost-quadmath bug with setprecision(0).
* Deprecate use of Visual Studio 2005 "-vc8" project files in the
windows directory.
Changes between 1.41 (released 2015-03-09) and 1.40 versions:
* Fix bug in Rhumb::Inverse (with exact = true) and related functions
which causes the wrong distance to be reported if one of the end
points is at a pole. Thanks to Thomas Murray for reporting this.
* Add International Geomagnetic Reference Field (12th generation),
which approximates the main magnetic field of the earth for the
period 1900-2020.
* Split information about Jacobi's conformal projection to a separate
section and include more material.
Changes between 1.40 (released 2014-12-18) and 1.39 versions:
* Add the World Magnetic Model 2015, wmm2015. This is now the default
magnetic model for MagneticField (replacing wmm2010 which is valid
thru the end of 2014).
* Geodesic::Inverse didn't return NaN if one of the longitudes was a
NaN (bug introduced in version 1.25). Fixed in the C++, Java,
JavaScript, C, Fortran, and Python implementations of the geodesic
routines. This bug was not present in the Matlab version.
* Fix bug in Utility::readarray and Utility::writearray which caused
an exception in debug mode with zero-sized arrays.
* Fix BLUNDER in OSGB::GridReference (found by kalderami) where the
wrong result was returned if the easting or northing was negative.
* OSGB::GridReference now returns "INVALID" if either coordinate is
NaN. Similarly a grid reference starting with "IN" results in NaNs
for the coordinates.
* Default constructor for GeoCoords corresponds to an undefined
position (latitude and longitude = NaN), instead of the north pole.
* Add an online version of RhumbSolve at
http://geographiclib.sourceforge.net/cgi-bin/RhumbSolve.
* Additions to the documentation:
+ documentation on Jacobi's conformal projection;
+ a page on Auxiliary latitudes (actually, this was added in
version 1.39);
+ document the use of two single quotes to stand for a double quote
in DMS (this feature was introduced in version 1.13).
* The Matlab function, geographiclibinterface, which compiles the
wrapper routines for Matlab now works with Matlab 2014b on a Mac.
Changes between 1.39 (released 2014-11-11) and 1.38 versions:
* GeographicLib usually normalizes longitudes to the range [-180deg,
180deg). However, when solving the direct geodesic and rhumb line
problems, it is sometimes necessary to know how many lines the line
encircled the earth by returning the longitude "unwrapped". So the
following changes have been made:
+ add a LONG_NOWRAP flag to mask enums for the outmask arguments for
Geodesic, GeodesicLine, Rhumb, and RhumbLine;
+ similar changes have been made to the Python, Javascript, and
Java implementations of the geodesic routines;
+ for the C, Fortran, and Matlab implementations the arcmode
argument to the routines was generalized to allow a combination of
ARCMODE and LONG_NOWRAP bits;
+ the Maxima version now returns the longitude unwrapped.
These changes were necessary to fix the PolygonAreaT::AddEdge (see
the next item).
* Changes in area calculations:
+ fix BUG in PolygonAreaT::AddEdge (also in C, Java, Javascript, and
Python implementations) which sometimes causes the wrong area to
be returned if the edge spanned more than 180deg;
+ add area calculation to the Rhumb and RhumbLine classes and the
RhumbSolve utility;
+ add PolygonAreaRhumb typedef for PolygonAreaT<Rhumb>;
+ add -R option to Planimeter to use PolygonAreaRhumb (and -G option
for the default geodesic polygon);
+ fix BLUNDER in area calculation in Matlab routine geodreckon;
+ add area calculation to Matlab/Octave routines for great ellipses.
* Fix bad BUG in Geohash::Reverse; this was introduced in version 1.37
and affected all platforms where unsigned longs are 32-bits. Thanks
to Christian Csar for reporting and diagnosing this.
* Binary installers for Windows are now built with Visual Studio 11
2012 (instead of Visual Studio 10 2010). Compiled Matlab support
still with version 2013a (64-bit).
* Update GeographicLib.pro for builds with qmake to include all the
source files.
* Cmake updates:
+ include cross-compiling checks in cmake config file;
+ improve the way unsuitable versions are reported;
+ include_directories (${GeographicLib_INCLUDE_DIRS}) is no longer
necessary with cmake 2.8.11 or later.
* legacy/Fortran now includes drop-in replacements for the geodesic
utilities from the NGS.
* geographiclib-get-{geoids,gravity,magnetic} with no arguments now
print the usage instead of loading the minimal sets.
* Utility::date(const std::string&, int&, int&, int&) and hence the
MagneticField utility accepts the string "now" as a legal time
(meaning today).
Changes between 1.38 (released 2014-10-02) and 1.37 versions:
* On MacOSX, the installed package is relocatable (for cmake version
2.8.12 and later).
* On Mac OSX, GeographicLib can be installed using homebrew.
* In cmake builds under Windows, set the output directories so that
binaries and shared libraries are together.
* Accept the minus sign as a synonym for - in DMS.{cpp,js}.
* The cmake configuration file geographiclib-depends.cmake has been
renamed to geographiclib-targets.cmake.
* Matlab/Octave routines for great ellipses added.
* Provide man pages for geographiclib-get-{geoids,gravity,magnetic}.
Changes between 1.37 (released 2014-08-08) and 1.36 versions:
* Add support for high precision arithmetic.
* INCOMPATIBLE CHANGE: the static instantiations of various classes
for the WGS84 ellipsoid have been changed to a "construct on first
use idiom". This avoids a lot of wasteful initialization before the
user's code starts. Unfortunately it means that existing source
code that relies on any of the following static variables will need
to be changed to a function call:
+ AlbersEqualArea::AzimuthalEqualAreaNorth
+ AlbersEqualArea::AzimuthalEqualAreaSouth
+ AlbersEqualArea::CylindricalEqualArea
+ Ellipsoid::WGS84
+ Geocentric::WGS84
+ Geodesic::WGS84
+ GeodesicExact::WGS84
+ LambertConformalConic::Mercator
+ NormalGravity::GRS80
+ NormalGravity::WGS84
+ PolarStereographic::UPS
+ TransverseMercator::UTM
+ TransverseMercatorExact::UTM
Thus, occurrences of, for example,
const Geodesic& geod = Geodesic::WGS84; // version 1.36 and earlier
need to be changed to
const Geodesic& geod = Geodesic::WGS84(); // version 1.37 and later
(note the parentheses!); alternatively use
// works with all versions
const Geodesic geod(Constants::WGS84_a(), Constants::WGS84_a());
* Incompatible change: the environment variables
{GEOID,GRAVITY,MAGNETIC}_{NAME,PATH} are now prefixed with
GEOGRAPHICLIB_.
* Incompatible change for Windows XP: retire the Windows XP common
data path. If you're still using Windows XP, then you might have to
move the folder C:\Documents and Settings\All Users\Application
Data\GeographicLib to C:\ProgramData\GeographicLib.
* All macro names affecting the compilation now start with
GEOGRAPHICLIB_; this applies to GEOID_DEFAULT_NAME,
GRAVITY_DEFAULT_NAME, MAGNETIC_DEFAULT_NAME, PGM_PIXEL_WIDTH,
HAVE_LONG_DOUBLE, STATIC_ASSERT, WORDS_BIGENDIAN.
* Changes to PolygonArea:
+ introduce PolygonAreaT which takes a geodesic class as a
parameter;
+ PolygonArea and PolygonAreaExact are typedef'ed to
PolygonAreaT<Geodesic> and PolygonAreaT<GeodesicExact>;
+ add -E option to Planimeter to use PolygonAreaExact;
+ add -Q option to Planimeter to calculate the area on the authalic
sphere.
* Add -p option to Planimeter, ConicProj, GeodesicProj,
TransverseMercatorProj.
* Add Rhumb and RhumbLine classes and the RhumbSolve utility.
* Minor changes to NormalGravity:
+ add J2ToFlattening and FlatteningToJ2;
+ use Newton's method to determine f from J2;
+ in constructor, allow omega = 0 (i.e., treat the spherical case).
* Add grs80 GravityModel.
* Make geographiclib-get-{geoids,gravity,magnetic} scripts work on
MacOS.
* Minor changes:
+ simplify cross-platform support for C++11 mathematical functions;
+ change way area coefficients are given in GeodesicExact to improve
compile times;
+ enable searching the online documentation;
+ add macros GEOGRAPHICLIB_VERSION and GEOGRAPHICLIB_VERSION_NUM;
+ add solution and project files for Visual Studio Express 2010.
Changes between 1.36 (released 2014-05-13) and 1.35 versions:
* Changes to comply with NGA's prohibition of the use of the
upper-case letters N/S to designate the hemisphere when displaying
UTM/UPS coordinates:
+ UTMUPS::DecodeZone allows north/south as hemisphere designators
(in addition to n/s);
+ UTMUPS::EncodeZone now encodes the hemisphere in lower case (to
distinguish this use from a grid zone designator);
+ UTMUPS::EncodeZone takes an optional parameter abbrev to
indicate whether to use n/s or north/south as the hemisphere
designator;
+ GeoCoords::UTMUPSRepresentation and AltUTMUPSRepresentation
similarly accept the abbrev parameter;
+ GeoConvert uses the flags -a and -l to govern whether UTM/UPS
output uses n/s (the -a flag) or north/south (the -l flag) to
denote the hemisphere;
+ Fixed a bug what allowed +3N to be accepted as an alternation
UTM zone designation (instead of 3N).
WARNING: The use of lower case n/s for the hemisphere might cause
compatibility problems. However DecodeZone has always accepted
either case; so the issue will only arise with other software
reading the zone information. To avoid possible misinterpretation
of the zone designator, consider calling EncodeZone with abbrev =
false and GeoConvert with -l, so that north/south are used to
denote the hemisphere.
* MGRS::Forward with prec = -1 will produce a grid zone designation.
Similarly MGRS::Reverse will decode a grid zone designation (and
return prec = -1).
* Stop using the throw() declaration specification which is
deprecated in C++11.
* Add missing std:: qualifications to copy in LocalCartesion and
Geocentric headers (bug found by Clemens).
Changes between 1.35 (released 2014-03-13) and 1.34 versions:
* Fix blunder in UTMUPS::EncodeEPSG (found by Ben Adler).
* Matlab wrapper routines geodesic{direct,inverse,line} switch to
"exact" routes if |f| > 0.02.
* GeodSolve.cgi allows ellipsoid to be set (and uses the -E option
for GeodSolve).
* Set title in HTML versions of man pages for the utility programs.
* Changes in cmake support:
+ add _d to names of executables in debug mode of Visual Studio;
+ add support for Android (cmake-only), thanks to Pullan Yu;
+ check CPACK version numbers supplied on command line;
+ configured version of project-config.cmake.in is
project-config.cmake (instead of geographiclib-config.cmake), to
prevent find_package incorrectly using this file;
+ fix tests with multi-line output;
+ this release includes a file, pom.xml, which is used by an
experimental build system (based on maven) at SRI.
Changes between 1.34 (released 2013-12-11) and 1.33 versions:
* Many changes in cmake support:
+ minimum version of cmake needed increased to 2.8.4 (which was
released in 2011-02);
+ allow building both shared and static librarys with
-D GEOGRAPHICLIB_LIB_TYPE=BOTH;
+ both shared and static libraries (Release plus Debug) included in
binary installer;
+ find_package uses COMPONENTS and GeographicLib_USE_STATIC_LIBS to
select the library to use;
+ find_package version checking allows nmake and Visual Studio
generators to interoperate on Windows;
+ find_package (GeographicLib ...) requires that GeographicLib be
capitalized correctly;
+ on Unix/Linux, don't include the version number in directory for
the cmake configuration files;
+ defaults for GEOGRAPHICLIB_DOCUMENTATION and
BUILD_NETGEOGRAPHICLIB are now OFF;
+ the GEOGRAPHICLIB_EXAMPLES configuration parameter is no longer
used; cmake always configures to build the examples, but they are
not built by default (instead build targets: exampleprograms and
netexamples);
+ matlab-all target renamed to matlabinterface;
+ the configuration parameters PACKAGE_PATH and INSTALL_PATH are
now deprecated (use CMAKE_INSTALL_PREFIX instead);
+ on Linux, the installed package is relocatable;
+ on MacOSX, the installed utilities can find the shared library.
* Use a more precise value for OSGB::CentralScale().
* Add Arc routines to python interface.
* The Geod utility has been removed; the same functionality lives on
with GeodSolve (introduced in version 1.30).
Changes between 1.33 (released 2013-10-08) and 1.32 versions:
* Add NETGeographic .NET wrapper library (courtesy of Scott Heiman).
* Make inspector functions in GeographicLib::Ellipsoid const.
* Add Accumulator.cpp to instantiate GeographicLib::Accumulator.
* Defer some of the initialization of GeographicLib::OSGB to when it
is first called.
* Fix bug in autoconf builds under MacOS.
Changes between 1.32 (released 2013-07-12) and 1.31 versions:
* Generalize C interface for polygon areas to allow vertices to be
specified incrementally.
* Fix way flags for C++11 support are determined.
Changes between 1.31 (released 2013-07-01) and 1.30 versions:
* Changes breaking binary compatibility (source compatibility is
maintained):
+ overloaded versions of DMS::Encode,
EllipticFunction::EllipticFunction, and
GeoCoords::DMSRepresentation, have been eliminated by the use of
optional arguments;
+ correct the declaration of first arg to UTMUPS::DecodeEPSG.
* FIX BUG in GeographicLib::GravityCircle constructor (found by
Mathieu Peyréga) which caused bogus results for the gravity
disturbance and gravity anomaly vectors. (This only affected
calculations using GravityCircle. GravityModel calculations did not
suffer from this bug.)
* Improvements to the build:
+ add macros GEOGRAPHICLIB_VERSION_{MAJOR,MINOR,PATCH} to Config.h;
+ fix documentation for new version of perlpod;
+ improving setting of runtime path for Unix-like systems with
cmake;
+ install PDB files when compiling with Visual Studio to aid
debugging;
+ Windows binary release now uses Matlab R2013a (64-bit) and uses
the -largeArrayDims option.
* Changes to the geodesic routines:
+ add Java implementation of the geodesic routines (thanks to Skip
Breidbach for the maven support);
+ FIX BUG: avoid altering input args in Fortran implementation;
+ more systematic treatment of very short geodesic;
+ fixes to python port so that they work with version 3.x, in
addition to 2.x (courtesy of Amato);
+ accumulate the perimeter and area of polygons via a double-wide
accumulator in Fortran, C, and Matlab implementations (this is
already included in the other implementations);
+ port PolygonArea::AddEdge and PolygonArea::TestEdge to JavaScript
and python interfaces;
+ include documentation on short geodesics.
* Unix scripts for downloading datasets,
geographiclib-get-{geoids,gravity,magnetic}, skip already download
models by default, unless the -f flag is given.
* FIX BUGS: meridian convergence and scale returned by
TransverseMercatorExact was wrong at a pole.
* Improve efficiency of MGRS::Forward by avoiding the calculation of
the latitude if possible (adapting an idea of Craig Rollins).
* Fixes to the way the Matlab interface routines are built (thanks to
Phil Miller and Chris F.).
Changes between 1.30 (released 2013-02-27) and 1.29 versions:
* Changes to geodesic routines:
+ fix BUG in fail-safe mechanisms in Geodesic::Inverse;
+ the command line utility Geod is now called GeodSolve;
+ allow addition of polygon edges in PolygonArea;
+ add full Maxima implementation of geodesic algorithms.
Changes between 1.29 (released 2013-01-16) and 1.28 versions:
* Changes to allow compilation with libc++ (courtesy of Kal Conley).
* Add description of geodesics on triaxial ellipsoid to
documentation.
* Update journal reference for "Algorithms for geodesics".
Changes between 1.28 (released 2012-12-11) and 1.27 versions:
* Changes to geodesic routines:
+ compute longitude difference exactly;
+ hence fix BUG in area calculations for polygons with vertices very
close to the prime meridian;
+ fix BUG is geoddistance.m where the value of m12 was wrong for
meridional geodesics;
+ add Matlab implementations of the geodesic projections;
+ remove unneeded special code for geodesics which start at a pole;
+ include polygon area routine in C and Fortran implementations;
+ add doxygen documentation for C and Fortran libraries.
Changes between 1.27 (released 2012-11-29) and 1.26 versions:
* Changes to geodesic routines:
+ add native Matlab implementations: geoddistance.m, geodreckon.m,
geodarea.m;
+ add C and Fortran implementations;
+ improve the solution of the direct problem so that the series
solution is accurate to round off for |f| < 1/50;
+ tighten up the convergence criteria for solution of the inverse
problem;
+ no longer signal failures of convergence with NaNs (a slightly
less accurate answer is returned instead).
* Fix DMS::Decode double rounding BUG.
* On MacOSX platforms with the cmake configuration, universal
binaries are built.
Changes between 1.26 (released 2012-10-22) and 1.25 versions:
* Replace the series used for geodesic areas by one with better
convergence (this only makes an appreciable difference if |f| >
1/150).
Changes between 1.25 (released 2012-10-16) and 1.24 versions:
* Changes to geodesic calculations:
+ restart Newton's method in Geodesic::Inverse when it goes awry;
+ back up Newton's method with the bisection method;
+ Geodesic::Inverse now converges for any value of f;
+ add GeodesicExact and GeodesicLineExact which are formulated in
terms of elliptic integrals and thus yield accurate results
even for very eccentric ellipsoids.
+ the -E option to Geod invokes these exact classes.
* Add functionality to EllipticFunction:
+ add all the traditional elliptic integrals;
+ remove restrictions on argument range for incomplete elliptic
integrals;
+ allow imaginary modulus for elliptic integrals and elliptic
functions;
+ make interface to the symmetric elliptic integrals public.
* Allow GeographicLib::Ellipsoid to be copied.
* Changes to the build tools:
+ cmake uses folders in Visual Studio to reduce clutter;
+ allow precision of reals to be set in cmake;
+ fail gracefully in the absence of pod documentation tools;
+ remove support for maintainer tasks in Makefile.mk;
+ upgrade to automake 1.11.6 to fix the "make distcheck" security
vulnerability; see
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3386
Changes between 1.24 (released 2012-09-22) and 1.23 versions:
* Allow the specification of the hemisphere in UTM coordinates in
order to provide continuity across the equator:
+ add UTMUPS::Transfer;
+ add GeoCoords::UTMUPSRepresentation(bool, int) and
GeoCoords::AltUTMUPSRepresentation(bool, int);
+ use the hemisphere letter in, e.g., GeoConvert -u -z 31N.
* Add UTMUPS::DecodeEPSG and UTMUPS::EncodeEPSG.
* cmake changes:
+ restore support for cmake 2.4.x;
+ explicitly check version of doxygen.
* Fix building under cygwin.
* Document restrictions on f in the Introduction.
* Fix python interface to work with version 2.6.x.
Changes between 1.23 (released 2012-07-17) and 1.22 versions:
* Documentation changes:
+ remove html documentation from distribution and use web links if
doxygen is not available;
+ use doxygen tags to document exceptions;
+ begin migrating the documentation to using Greek letters where
appropriate (requires doxygen 1.8.1.2 or later).
* Add Math::AngNormalize and Math::AngNormalize2; the allowed range
for longitudes and azimuths widened to [-540d, 540d).
* DMS::Decode understands more unicode symbols.
* Geohash uses geohash code "nan" to stand for not a number.
* Add Ellipsoid::NormalCurvatureRadius.
* Various fixes in LambertConformalConic, TransverseMercator,
PolarStereographic, and Ellipsoid to handle reverse projections of
points near infinity.
* Fix programming blunder in LambertConformalConic::Forward (incorrect
results were returned if the tangent latitude was negative).
Changes between 1.22 (released 2012-05-27) and 1.21 versions:
* Add Geohash and Ellipsoid classes.
* Fix bug in AlbersEqualArea of very prolate ellipsoids (b^2 > 2
a^2).
* cmake changes:
+ optionally use PACKAGE_PATH and INSTALL_PATH to determine
CMAKE_INSTALL_PREFIX;
+ use COMMON_INSTALL_PATH to determine layout of installation
directories;
+ as a consequence, the installation paths for the documentation,
and python and matlab interfaces are shortened for Windows;
+ zip source distribution now uses DOS line endings;
+ the tests work in debug mode for Windows;
+ default setting of GEOGRAPHICLIB_DATA does not depend on
CMAKE_INSTALL_PREFIX;
+ add a cmake configuration for build tree.
Changes between 1.21 (released 2012-04-25) and 1.20 versions:
* Support colon-separated DMS output:
+ DMS::Encode and GeoCoords::DMSRepresentation generalized;
+ GeoConvert and Geod now accept a -: option.
* GeoidEval does not print the gradient of the geoid height by default
(because it's subject to large errors); give the -g option to get
the gradient printed.
* Work around optimization BUG in GeographicLib::Geodesic::Inverse
with tdm mingw g++ version 4.6.1.
* autoconf fixed to ensure that that out-of-sources builds work;
document this as the preferred method of using autoconf.
* cmake tweaks:
+ simplify the configuration of doxygen;
+ allow the Matlab compiler to be specified with the MATLAB_COMPILER option.
Changes between 1.20 (released 2012-03-23) and 1.19 versions:
* cmake tweaks:
+ improve find_package's matching of compiler versions;
+ CMAKE_INSTALL_PREFIX set from CMAKE_PREFIX_PATH if available;
+ add "x64" to the package name for the 64-bit binary installer;
+ fix cmake warning with Visual Studio Express.
* Fix SphericalEngine to deal with aggressive iterator checking by
Visual Studio.
* Fix transcription BUG is Geodesic.js.
Changes between 1.19 (released 2012-03-13) and 1.18 versions:
* Slight improvement in Geodesic::Inverse for very short lines.
* Fix argument checking tests in MGRS::Forward.
* Add --comment-delimiter and --line-separator options to the utility
programs.
* Add installer for 64-bit Windows; the compiled Matlab interface is
supplied with the Windows 64-bit installer only.
Changes between 1.18 (released 2012-02-18) and 1.17 versions:
* Improve documentation on configuration with cmake.
* cmake's find_package ensures that the compiler versions match on Windows.
* Improve documentation on compiling Matlab interface.
* Binary installer for Windows installs under C:/pkg-vc10 by default.
Changes between 1.17 (released 2012-01-21) and 1.16 versions:
* Work around optimization BUG in Geodesic::Inverse with g++ version
4.4.0 (mingw).
* Fix BUG in argument checking with OSGB::GridReference.
* Fix missing include file in SphericalHarmonic2.
* Add simple examples of usage for each class.
* Add internal documenation to the cmake configuration files.
Changes between 1.16 (released 2011-12-07) and 1.15 versions:
* Add calculation of the earth's gravitational field:
+ add NormalGravity GravityModel and GravityCircle classes;
+ add command line utility Gravity;
+ add Gravity models;
+ add Constants::WGS84_GM(), Constants::WGS84_omega(), and similarly
for GRS80.
* Build uses GEOGRAPHICLIB_DATA to specify a common parent directory
for geoid, gravity, and magnetic data (instead of
GEOGRAPHICLIB_GEOID_PATH, etc.); similarly, GeoidEval, Gravity, and
MagneticField, look at the environment variable GEOGRAPHICLIB_DATA
to locate the data.
* Spherical harmonic software changes:
+ capitalize enums SphericalHarmonic::FULL and
SphericalHarmonic::SCHMIDT (the lower case names are retained but
deprecated);
+ optimize the sum by using a static table of square roots which is
updated by SphericalEngine::RootTable;
+ avoid overflow for high degree models.
* Magnetic software fixes:
+ fix documentation BUG in MagneticModel::Circle;
+ make MagneticModel constructor explicit;
+ provide default MagneticCircle constructor;
+ add additional inspector functions to MagneticCircle;
+ add -c option to MagneticField;
+ default height to zero in MagneticField.
Changes between 1.15 (released 2011-11-08) and 1.14 versions:
* Add calculation of the earth's magnetic field:
+ add MagneticModel and MagneticCircle classes;
+ add command line utility MagneticField;
+ add Magnetic models;
+ add Installing the magnetic field models;
+ add The format of the magnetic model files;
+ add classes SphericalEngine, CircularEngine, SphericalHarmonic,
SphericalHarmonic1, and SphericalHarmonic2. which sum spherical
harmonic series.
* Add Utility class to support I/O and date manipulation.
* Cmake configuration includes a _d suffix on the library built in
debug mode.
* For the Python package, include manifest and readme files; don't
install setup.py for non-Windows systems.
* Include Doxygen tag file in distribution as doc/html/Geographic.tag.
Changes between 1.14 (released 2011-09-30) and 1.13 versions:
* Ensure that geographiclib-config.cmake is relocatable.
* Allow more unicode symbols to be used in DMS::Decode.
* Modify GeoidEval so that it can be used to convert the height datum
for LIDAR data.
* Modest speed-up of Geodesic::Inverse.
* Changes in python interface:
+ FIX BUG in transcription of Geodesic::Inverse;
+ include setup.py for easy installation;
+ python only distribution is available at
http://pypi.python.org/pypi/geographiclib
* Supply a minimal Qt qmake project file for library
src/Geographic.pro.
Changes between 1.13 (released 2011-08-13) and 1.12 versions:
* Changes to I/O:
+ allow : (colon) to be used as a DMS separator in DMS::Decode;
+ also accept Unicode symbols for degrees, minutes, and seconds
(coded as UTF-8);
+ provide optional swaplatlong argument to various DMS and GeoCoords
functions to make longitude precede latitude;
+ GeoConvert now has a -w option to make longitude precede latitude
on input and output;
+ include a JavaScript version of DMS.
* Slight improvement in starting guess for solution of geographic
latitude in terms of conformal latitude in TransverseMercator,
TransverseMercatorExact, and LambertConformalConic.
* For most classes, get rid of const member variables so that the
default copy assignment works.
* Put Math and Accumulator in their own header files.
* Remove unused "fast" GeographicLib::Accumulator method.
* Reorganize the Python interface.
* Withdraw some deprecated routines.
* cmake changes:
+ include FindGeographic.cmake in distribution;
+ building with cmake creates and installs
geographiclib-config.cmake;
+ better support for building a shared library under Windows.
Changes between 1.12 (released 2011-07-21) and 1.11 versions:
* Change license to MIT/X11.
* Add GeographicLib::PolygonArea class and equivalent Matlab function.
* Provide JavaScript and Python implementations of geodesic routines.
* Fix Windows installer to include runtime dlls for Matlab.
* Fix (innocuous) unassigned variable in Geodesic::GenInverse.
* Geodesic routines in Matlab return a12 as first column of aux return
value (incompatible change).
* A couple of code changes to enable compilation with Visual Studio
2003.
Changes between 1.11 (released 2011-06-27) and 1.10 versions:
* Changes to Planimeter:
+ add -l flag to Planimeter for polyline calculations;
+ trim precision of area to 3 decimal places;
+ FIX BUG with pole crossing edges (due to compiler optimization).
* Geod no longer reports the reduced length by default; however the -f
flag still reports this and in addition gives the geodesic scales
and the geodesic area.
* FIX BUGS (compiler-specific) in inverse geodesic calculations.
* FIX BUG: accommodate tellg() returning -1 at end of string.
* Change way flattening of the ellipsoid is specified:
+ constructors take f argument which is taken to be the flattening
if f < 1 and the inverse flattening otherwise (this is a
compatible change for spheres and oblate ellipsoids, but it is an
INCOMPATIBLE change for prolate ellipsoids);
+ the -e arguments to the Utility Programs are handled similarly; in
addition, simple fractions, e.g., 1/297, can be used for the
flattening;
+ introduce Constants::WGS84_f() for the WGS84 flattening (and
deprecate Constants::WGS84_r() for the inverse flattening);
+ most classes have a Flattening() member function;
+ InverseFlattening() has been deprecated (and now returns inf for a
sphere, instead of 0).
Changes between 1.10 (released 2011-06-11) and 1.9 versions:
* Improvements to Matlab/Octave interface:
+ add {geocentric,localcartesian}{forward,reverse};
+ make geographiclibinterface more general;
+ install the source for the interface;
+ cmake compiles the interface if ENABLE_MATLAB=ON;
+ include compiled interface with Windows binary installer.
* Fix various configuration issues
+ autoconf did not install Config.h;
+ cmake installed in man/man1 instead of share/man/man1;
+ cmake did not set the rpath on the tools.
Changes between 1.9 (released 2011-05-28) and 1.8 versions:
* FIX BUG in area returned by Planimeter for pole encircling polygons.
* FIX BUG in error message reported when DMS::Decode reads the string
"5d.".
* FIX BUG in AlbersEqualArea::Reverse (lon0 not being used).
* Ensure that all exceptions thrown in the Utility Programs are
caught.
* Avoid using catch within GeographicLib::DMS.
* Move Accumulator class from Planimeter.cpp to Constants.hpp.
* Add Math::sq<T>.
* Simplify Installing the geoid datasets
+ add geographiclib-get-geoids for Unix-like systems;
+ add installers for Windows.
* Provide cmake support:
+ build binary installer for Windows;
+ include regression tests;
+ add --input-string, --input-file, --output-file options to the
Utility Programs to support tests.
* Rename utility EquidistantTest as GeodesicProj and
TransverseMercatorTest as TransverseMercatorProj.
* Add ConicProj.
* Reverse the initial sense of the -s option for Planimeter.
* Migrate source from subversion to git.
Changes between 1.8 (released 2011-02-22) and 1.7 versions:
* Optionally return rotation matrix from GeographicLib::Geocentric and
GeographicLib::LocalCartesian.
* For the Utility Programs, supply man pages, -h prints the synopsis,
--help prints the man page, --version prints the version.
* Use accurate summation in Planimeter.
* Add 64-bit targets for Visual Studio 2010.
* Use templates for defining math functions and some constants.
* GeographicLib::Geoid updates
+ Add GeographicLib::Geoid::DefaultGeoidPath and
GeographicLib::Geoid::DefaultGeoidName;
+ GeoidEval uses environment variable GEOID_NAME as the default
geoid;
+ Add --msltohae and --haetomsl as GeoidEval options (and don't
document the single hyphen versions).
* Remove documentation that duplicates papers on transverse Mercator
and geodesics.
Changes between 1.7 (released 2010-12-21) and 1.6 versions:
* FIX BUG in scale returned by GeographicLib::LambertConformalConic::Reverse.
* Add GeographicLib::AlbersEqualArea projection.
* Library created by Visual Studio is Geographic.lib instead of
GeographicLib.lib (compatible with makefiles).
* Make classes NaN aware.
* Use cell arrays for MGRS strings in Matlab.
* Add solution/project files for Visual Studio 2010 (32-bit only).
* Use C++11 static_assert and math functions, if available.
Change between 1.6 (released 2010-11-23) and 1.5 versions:
* FIX BUG introduced in GeographicLib::Geoid in version 1.5 (found by
Dave Edwards).
Changes between 1.5 (released 2010-11-19) and 1.4 versions:
* Improve area calculations for small polygons.
* Add -s and -r flags to Planimeter utility.
* Improve the accuracy of GeographicLib::LambertConformalConic using
divided differences.
* FIX BUG in meridian convergence returned by
LambertConformalConic::Forward.
* Add optional threadsafe parameter to GeographicLib::Geoid
constructor. WARNING: This changes may break binary compatibility
with previous versions of GeographicLib. However, the library is
source compatible.
* Add GeographicLib::OSGB.
* Matlab and Octave interfaces to GeographicLib::UTMUPS,
GeographicLib::MGRS, GeographicLib::Geoid, GeographicLib::Geodesic
provided.
* Minor changes
+ explicitly turn on optimization in Visual Studio 2008 projects;
+ add missing dependencies in some Makefiles;
+ move pi() and degree() from GeographicLib::Constants to
GeographicLib::Math;