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From: Charles Karney <charles.karney@sr...>  20160215 01:59:09

Changes between 1.46 (released 20160215) 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 southgoing 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 toplevel 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 
From: Charles Karney <charles.karney@sr...>  20150930 12:42:38

Changes between 1.45 (released 20150930) 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 199812) 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 zerolength 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 nonconvergence 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. 
From: Charles Karney <charles.karney@sr...>  20150814 22:07:11

Changes between 1.44 (released 20150814) and 1.43 versions: * Various changes to improve accuracy, e.g., by minimizing roundoff 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 roundoff 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 submeter 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 submeter 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 latitudelongitude order on input and output (and where appropriate on the commandline 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+0:400:0:10 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 geodcalc.html and geodgoogle.html report the version number; o http://geographiclib.sourceforge.net/scripts/ gives access to earlier versions of geographiclib.js as geographiclibm.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. * MATLABspecific 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. 
From: Charles Karney <charles.karney@sr...>  20150522 15:43:19

Changes between 1.43 (released 20150523) 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 westgoing 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 builtin function for MATLAB/Octave). This evaluates a polynomial using Horner's method. The Maximagenerated code fragments for the evaluation of series in the Geodesic, TransverseMercator, and Rhumb classes and MATLAB routines for great ellipses have been replaced by Maximagenerated 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 nonWindows 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 
From: Charles Karney <charles.karney@sr...>  20150428 12:35:03

Changes between 1.42 (released 20150428) 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 nonWindows systems, the cmake configstyle find_package files are now installed under ${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX} instead of ${CMAKE_INSTALL_PREFIX}/share, because the files are architecturespecific. This change will let 32bit and 64bit 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/geographicliblegacy contains wrapper functions to mimic the previous compiled functionality; + the installed MATLAB code mirrors this layout, but the parent installation directory on nonWindows 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, 20140422). * artifactId for Java package changed from GeographicLib to GeographicLibJava and the package is now depolyed 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 boostquadmath bug with setprecision(0). * Deprecate use of Visual Studio 2005 "vc8" project files in the windows directory. 
From: Charles Karney <charles.karney@sr...>  20150309 18:46:46

Changes between 1.41 (released 20150309) 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 19002020. * Split information about Jacobi's conformal projection to a separate section and include more material. 
From: Charles Karney <charles.karney@sr...>  20141218 16:13:25

Changes between 1.40 (released 20141218) 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 zerosized 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/cgibin/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. 
From: Charles Karney <charles.karney@sr...>  20141124 14:37:14

A bug is the treatment of NaNs by Geodesic::Inverse was introduced in version 1.25. The symptoms is that finite bogus results are returned when a NaN is provided as one of input arguments; for example $ echo 0 10 20 nan  GeodSolve i 70.06176456 90.00000000 9987119.260 The attached patch fixes this bug. This will be included in the next release of GeographicLib. 
From: Charles Karney <charles.karney@sr...>  20141111 13:18:25

Changes between 1.39 (released 20141111) 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 32bits. 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 (64bit). * Update GeographicLib.pro for builds with qmake to include all the source files. * Cmake updates: + include crosscompiling 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 dropin replacements for the geodesic utilities from the NGS. * geographiclibget{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). 
From: Charles Karney <charles.karney@sr...>  20141002 15:58:17

Changes between 1.38 (released 20141002) 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 synomym for  in DMS.{cpp,js}. * The cmake configuration file geographiclibdepends.cmake has been renamed to geographiclibtargets.cmake. * Matlab/Octave routines for great ellipses added. * Provide man pages for geographiclibget{geoids,gravity,magnetic}. 
From: Charles Karney <charles.karney@sr...>  20140808 09:51:38

Changes between 1.37 (released 20140808) 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 geographiclibget{geoids,gravity,magnetic} scripts work on MacOS. * Minor changes: + simplify crossplatform 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. 
From: Charles Karney <charles.karney@sr...>  20140513 15:16:03

Changes between 1.36 (released 20140513) and 1.35 versions: * Changes to comply with NGA's prohibition of the use of the uppercase 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). 
From: Charles Karney <charles.karney@sr...>  20140313 21:13:33

Changes between 1.35 (released 20140313) 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 (cmakeonly), thanks to Pullan Yu; + check CPACK version numbers supplied on command line; + configured version of projectconfig.cmake.in is projectconfig.cmake (instead of geographiclibconfig.cmake), to prevent find_package incorrectly using this file; + fix tests with multiline output; + this release includes a file, pom.xml, which is used by an experimental build system (based on maven) at SRI. 
From: Charles Karney <charles.karney@sr...>  20140116 14:26:52

Ben Adler found a bug in UTMUPS::EncodeEPSG. Here is the fix diff git a/src/UTMUPS.cpp b/src/UTMUPS.cpp index 2abf43e..ec66c1d 100644  a/src/UTMUPS.cpp +++ b/src/UTMUPS.cpp @@ 292,7 +292,7 @@ namespace GeographicLib { if (zone == UPS) epsg = epsgS; else if (zone >= MINUTMZONE && zone <= MAXUTMZONE)  epsg = epsg + (zone  MINUTMZONE) + epsg01S; + epsg = (zone  MINUTMZONE) + epsg01S; if (epsg >= 0 && northp) epsg += epsgN  epsgS; return epsg; This fix will appear in the next release of GeographicLib 
From: Charles Karney <charles.karney@sr...>  20131211 20:37:24

Changes for 1.33 and 1.34 are given here... Changes between 1.34 (released 20131211) and 1.33 versions: * Many changes in cmake support: + minimum version of cmake needed increased to 2.8.4 (which was released in 201102); + 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); + matlaball 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 20131008) 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. 
From: Charles Karney <charles.karney@sr...>  20130712 13:50:16

Changes between 1.32 (released 20130712) 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.  Charles Karney <charles.karney@...> SRI International, Princeton, NJ 085435300 Tel: +1 609 734 2312 Fax: +1 609 734 2662 
From: Charles Karney <charles.karney@sr...>  20130701 14:05:37

Changes between 1.31 (released 20130701) 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 Unixlike systems with cmake; + install PDB files when compiling with Visual Studio to aid debugging; + Windows binary release now uses Matlab R2013a (64bit) 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 doublewide 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, geographiclibget{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.).  Charles Karney <charles.karney@...> SRI International, Princeton, NJ 085435300 Tel: +1 609 734 2312 Fax: +1 609 734 2662 
From: Charles Karney <charles.karney@sr...>  20130410 14:15:00

Mathieu Peyréga found a bug in the constructor for GravityCircle 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.) The following patch (which will be included in the next release) fixes the problem.  a/include/GeographicLib/GravityCircle.hpp +++ b/include/GeographicLib/GravityCircle.hpp @@ 71,7 +71,7 @@ namespace GeographicLib { , _h(h) , _Z(Z) , _Px(P)  , _invR(Math::hypot(_Px, _Z)) + , _invR(1 / Math::hypot(_Px, _Z)) , _cpsi(_Px * _invR) , _spsi(_Z * _invR) , _cphi(cphi)  Charles Karney <charles.karney@...> SRI International, Princeton, NJ 085435300 Tel: +1 609 734 2312 Fax: +1 609 734 2662 
From: Charles Karney <charles.karney@sr...>  20130227 15:24:18

Changes between 1.30 (released 20130227) and 1.29 versions: * Changes to geodesic routines: + fix BUG in failsafe 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. 
From: Charles Karney <charles.karney@sr...>  20130116 15:35:49

Changes between 1.29 (released 20130116) 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". 
From: Charles Karney <charles.karney@sr...>  20121211 13:44:36

Here are the URLs for the documentation on the C and Fortran geodesic libraries: http://geographiclib.sourceforge.net/html/C/index.html http://geographiclib.sourceforge.net/html/Fortran/index.html 
From: Charles Karney <charles.karney@sr...>  20121211 13:43:58

Here an example of a triangle whose area is now computed correctly by PolygonArea: lat lon 9 0.00000000000001 9 180 9 0 Previously (version 1.27 and before) the area was computed as approximately 1/2 of the earth's area. Now (version 1.28) the area is correctly reported as close to 0. 
From: Charles Karney <charles.karney@sr...>  20121211 13:42:48

Changes between 1.28 (released 20121211) 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. 
From: Charles Karney <charles.karney@sr...>  20121129 15:30:17

Changes between 1.27 (released 20121129) 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. 