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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 1.46.
Changes between 1.46 (released 2016-02-15) and 1.45 versions:
* The following BUGS have been fixed:
+ the -w flag to Planimeter(1) was being ignored;
+ in the Java package, the wrong longitude was being returned with
direct geodesic calculation with a negative distance when starting
point was at a pole (this bug was introduced in version 1.44);
+ in the JavaScript package, PolygonArea.TestEdge contained a
misspelling of a variable name and other typos (problem found by
threepointone).
* INCOMPATIBLE CHANGES:
+ make the -w flag (to swap the default order of latitude and
longitude) a toggle for all utility programs;
+ the -a option to GeodSolve(1) now toggles (instead of sets) arc
mode;
+ swap order coslon and sinlon arguments in CircularEngine class.
* Remove deprecated functionality:
+ remove gradient calculation from the Geoid class and GeoidEval(1)
(this was inaccurate and of dubious utility);
+ remove reciprocal flattening functions, InverseFlattening in many
classes and Constants::WGS84_r(); stop treating flattening > 1 as
the reciprocal flattening in constructors;
+ remove DMS::Decode(string), DMS::DecodeFraction,
EllipticFunction:m, EllipticFunction:m1, Math::extradigits,
Math::AngNormalize2, PolygonArea::TestCompute;
+ stop treating LONG_NOWRAP as an alias for LONG_UNROLL in Geodesic
(and related classes) and Rhumb;
+ stop treating full/schmidt as aliases for FULL/SCHMIDT in
SphericalEngine (and related classes);
+ remove qmake project file src/GeographicLib.pro because QtCreator
can handle cmake projects now;
+ remove deprecated Visual Studio 2005 project and solution files.
* Changes to GeodesicLine and GeodesicLineExact classes; these changes
(1) simplify the process of computing waypoints on a geodesic given
two endpoints and (2) allow a GeodesicLine to be defined which is
consistent with the solution of the inverse problem (in particular
Geodesic::InverseLine the specification of south-going lines which
pass the poles in a westerly direction by setting sin alpha_1 = -0):
+ the class stores the distance s13 and arc length a13 to a
reference point 3; by default these quantities are NaNs;
+ GeodesicLine::SetDistance (and GeodesicLine::SetArc) specify the
distance (and arc length) to point 3;
+ GeodesicLine::Distance (and GeodesicLine::Arc) return the distance
(and arc length) to point 3;
+ new methods Geodesic::InverseLine and Geodesic::DirectLine return
a GeodesicLine with the reference point 3 defined as point 2 of
the corresponding geodesic calculation;
+ these changes are also included in the C, Java, JavaScript, and
Python packages.
* Other changes to the geodesic routines:
+ more accurate solution of the inverse problem when longitude
difference is close to 180deg (also in C, Fortran, Java,
JavaScript, Python, MATLAB, and Maxima packages);
+ more accurate calculation of lon2 in the inverse calculation with
LONG_UNROLL (also in Java, JavaScript, Python packages).
* Changes to GeodSolve(1) utility:
+ the -I and -D options now specify geodesic line calculation via
the standard inverse or direct geodesic problems;
+ rename -l flag to -L to parallel the new -I and -D flags (-l is is
retained for backward compatibility but is deprecated), and
similarly for RhumbSolve(1);
+ the -F flag (in conjunction with the -I or -D flags) specifies
that distances read on standard input are fractions of s13 or a13;
+ the -a option now toggles arc mode (noted above);
+ the -w option now toggles longitude first mode (noted above).
* Changes to Math class:
+ Math::copysign added;
+ add overloaded version of Math::AngDiff which returns the error in
the difference. This allows a more accurate treatment of inverse
geodesic problem when lon12 is close to 180deg;
+ Math::AngRound now converts tiny negative numbers to -0 (instead
of +0), however -0 is still converted to +0.
* Add -S and -T options to GeoConvert(1).
* Add Sphinx documentation for Python package.
* Samples of wrapping the C++ library, so it's accessible in other
languages, are given in wrapper/C, wrapper/python, and
wrapper/matlab.
* Binary installers for Windows now use Visual Studio 12 2013.
* Remove top-level pom.xml from release (it was specific to SRI).
* A reminder: because of the JavaScript changes introduced in version
1.45, you should remove the following installation directories from
your system:
+ Windows: ${CMAKE_INSTALL_PREFIX}/doc/scripts
+ Others: ${CMAKE_INSTALL_PREFIX}/share/doc/GeographicLib/scripts
Changes between 1.45 (released 2015-09-30) and 1.44 versions:
* Fix BUG in solution of inverse geodesic caused by misbehavior of
some versions of Visual Studio on Windows (fmod(-0.0, 360.0) returns
+0.0 instead of -0.0) and Octave (sind(-0.0) returns +0.0 instead of
-0.0). These bugs were exposed because max(-0.0, +0.0) returns -0.0
for some languages.
* Geodesic::Inverse now correctly returns NaNs if one of the latitudes
is a NaN.
* Changes to JavaScript package:
+ thanks to help from Yurij Mikhalevich, it is a now a node package
that can be installed with npm;
+ make install now installs the node package in
lib/node_modules/geographiclib;
+ add unit tests using mocha;
+ add documentation via JSDoc;
+ fix bug Geodesic.GenInverse (this bug, introduced in version 1.44,
resulted in the wrong azimuth being reported for points at the
pole).
* Changes to Java package:
+ add implementation of ellipsoidal Gnomonic projection (courtesy of
Sebastian Mattheis);
+ add unit tests using JUnit;
+ Math.toRadians and Math.toDegrees are used instead of
GeoMath.degree (which is now removed), as a result...
+ Java version 1.2 (released 1998-12) or later is now required.
* Changes to Python package:
+ add unit tests using the unittest framework;
+ fixed bug in normalization of the area.
* Changes to MATLAB package:
+ fix array size mismatch in geoddistance by avoiding calls to
subfunctions with zero-length arrays;
+ fix tranmerc_{fwd,inv} so that they work with arrays and mixed
array/scalar arguments;
+ work around Octave problem which causes mgrs_fwd to return garbage
with prec = 10 or 11;
+ add geographiclib_test.m to run a test suite.
* Behavior of substituting 1/f for f if f > 1 is now deprecated. This
behavior has been removed from the JavaScript, C, and Python
implementations (it was never documented). Maxima, MATLAB, and
Fortran implementations never included this behavior.
* Other changes:
+ fix bug, introduced in version 1.42, in the C++ implementation to
the computation of area which causes NaNs to be returned in the
case of a sphere;
+ fixed bug, introduced in version 1.44, in the detection of C++11
math functions in configure.ac;
+ throw error on non-convergence in Gnomonic::Reverse if
GEOGRAPHICLIB_PRECISION > 3;
+ add geod_polygon_clear to C library;
+ turn illegal latitudes into NaNs for Fortran library;
+ add test suites for the C and Fortran libraries.
Changes between 1.44 (released 2015-08-14) and 1.43 versions:
* Various changes to improve accuracy, e.g., by minimizing round-off
errors:
+ Add Math::sincosd, Math::sind, Math::cosd which take their
arguments in degrees. These functions do exact range reduction
and thus they obey exactly the elementary properties of the
trigonometric functions, e.g., sin 9d = cos 81d
= - sin 123456789d.
+ Math::AngNormalize now works for any angles, instead of angles in
the range [-540d, 540d); the function Math::AngNormalize2 is now
deprecated.
+ This means that there is now no restriction on longitudes and
azimuths; any values can be used.
+ Improve the accuracy of Math::atan2d.
+ DMS::Decode avoids unnecessary round-off errors; thus 7:33:36 and
7.56 result in identical values. DMS::Encode rounds ties to even.
These changes have also been made to DMS.js.
+ More accurate rounding in MGRS::Reverse and mgrs_inv.m; this
change only makes a difference at sub-meter precisions.
+ With MGRS::Forward and mgrs_fwd.m, ensure that digits in lower
precision results match those at higher precision; as a result,
strings of trailing 9s are less likely to be generated. This
change only makes a difference at sub-meter precisions.
+ Replace the series for A2 in the Geodesic class with one with
smaller truncation errors.
+ Geodesic::Inverse sets s12 to zero for coincident points at pole
(instead of returning a tiny quantity).
+ Math::LatFix returns its argument if it is in [-90d, 90d]; if not,
it returns NaN.
+ Using Math::LatFix, routines which don't check their arguments now
interpret a latitude outside the legal range of [-90d, 90d] as a
NaN; such routines will return NaNs instead of finite but
incorrect results; caution: code that (dangerously) relied on the
"reasonable" results being returned for values of the latitude
outside the allowed range will now malfunction.
* All the utility programs accept the -w option to swap the
latitude-longitude order on input and output (and where appropriate
on the command-line arguments). CartConvert now accepts the -p
option to set the precision; now all of the utilities except
GeoidEval accept -p.
* Add classes for GARS, the Global Area Reference System, and for
Georef, the World Geographic Reference System.
* Changes to DMS::Decode and DMS.js:
+ tighten up the rules:
o 30:70.0 and 30:60 are illegal (minutes and second must be
strictly less than 60), however
o 30:60.0 and 30:60. are legal (floating point 60 is OK, since it
might have been generated by rounding 59.99...);
+ generalize a+b concept, introduced in version 1.42, to any number
of pieces; thus 8+0:40-0:0:10 is interpreted as 8:39:50.
* Documentation fixes:
+ update man pages to refer to GeoConvert(1) on handling of
geographic coordinates;
+ document limitations of the series used for TransverseMercator;
+ hide the documentation of the computation of the gradient of the
geoid height (now deprecated) in the Geoid class;
+ warn about the possible misinterpretation of 7.0E+1 by
DMS::Decode;
+ swaplatlong optional argument of DMS::DecodeLatLon and various
functions in the GeoCoords class is now called longfirst;
+ require Doxygen 1.8.7 or later.
* More systematic treatment of version numbers:
+ Python: __init__.py defines __version__ and __version_info__;
+ JavaScript:
o Math.js defines Constants.version and Constants.version_string;
o version number included as comment in packed script
geographiclib.js;
o geod-calc.html and geod-google.html report the version number;
o http://geographiclib.sourceforge.net/scripts/ gives access to
earlier versions of geographiclib.js as geographiclib-m.nn.js;
+ Fortran: add geover subroutine to return version numbers;
+ Maxima: geodesic.mac defines geod_version;
+ CGI scripts: these report the version numbers of the utilities.
* BUG FIXES:
+ NormalGravity now works properly for a sphere (omega = f = J2 =
0), instead of returning NaNs (problem found by htallon);
+ CassiniSoldner::Forward and cassini_fwd.m now returns the correct
azimuth for points at the pole.
* MATLAB-specific fixes:
+ mgrs_fwd now treats treats prec > 11 as prec = 11;
+ illegal letter combinations are now correctly detected by
mgrs_inv;
+ fixed bug where mgrs_inv returned the wrong results for prec = 0
strings and center = 0;
+ mgrs_inv now decodes prec = 11 strings properly;
+ routines now return array results with the right shape;
+ routines now properly handle mixed scalar and array arguments.
* Add Accumulator<T>::operator*=(T y).
* Geohash uses "invalid" instead of "nan" when the latitude or
longitude is a nan.
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;