WCSLIB version 6.2 (2018/10/20) ------------------------------- * C library - Consequent on the change in release 6.1, reapplied soothing balm to the wtbarr struct definition in wcs.h for C++ compilation (C and Fortran compilation being unaffected). While the object libraries themselves are unchanged, the modified wcs.h must be installed for compiling C++ applications. Reported by Corentin Schreiber. * User manual - Fixed minor formatting problems with the doxygen manual generation. WCSLIB version 6.1 (2018/10/19) ------------------------------- * C library - Added support for time-related WCS keywords (Paper VII) by expanding the wcsprm struct to store them as auxiliary values, now filled by the header parsers, wcspih() and wcsbth() and handled routinely by wcsinit(), wcssub(), wcscompare(), wcsfree(), wcsprt(), wcsset(), and wcshdo(). - Augmented datfix() to do various consistency checks on the new time-related keyvalues, and added a new routine, obsfix(), to check consistency of the OBSGEO-[XYZLBH] observatory coordinates. - In the usage notes for wcsbth(), clarified that, according to WCS Papers III and VII, certain global image header keywords are permitted in binary table headers and are expected to be inherited by image arrays and pixel lists, and elaborated on the difficulties that such inheritance may cause for pixel lists. - Revamped message string handling in the wcserr module to allow arbitrarily long messages while greatly reducing the sizeof the struct. - Extracted the definition of the wtbarr struct from wcs.h to a separate header file, wtbarr.h, in order to reduce the number of irrelevant warnings generated by 'gcc -Wpadded' (primarily for code development). Applications code that needs to access members of the struct (unlikely) must now include wtbarr.h (or wcslib.h). - The WCSLIB major version number was incremented as changes to the wcsprm struct makes the ABI of the sharable library incompatible with executables linked with that of older releases. * Installation - Several changes to configure and the makefiles aimed at facilitating code development. * Fortran wrappers - Match changes to the C library, including adding a wrapper for obsfix(). WCSLIB version 5.20 (2018/10/05) -------------------------------- * C library - Added utility functions dpkeyi() and dpkeyd() to dis.c, and removed the corresponding functions from wcsutil.c. * Installation - Reworked the makefiles to allow parallel library builds, as required by some software distributions. Reported by Dustin Lang with suggested patch, and Zaak Beekman. (Parallel execution of the test suite is not supported.) - The introduction of "deterministic" archiving (ar(1)) broke dependency analysis in the WCSLIB makefiles on the many systems where it is now enabled by default (i.e. binutils configured with --enable-deterministic-archives). Modified configure to force non-deterministic archiving during the library builds, thus repairing the dependency analysis. However, the static object libraries are now reconstructed using deterministic archiving in the process of installing them. - Fixed problems with the dependency analysis, solely affecting code development. * Fortran wrappers - New wrappers for dpkeyi() and dpkeyd(). WCSLIB version 5.19.1 (2018/07/28) ---------------------------------- * Installation - Updated ./config/config.{guess,sub} to the latest versions from the GIT repository, timestamped 2018-07-18 and 2018-07-25, respectively. The previous pair were dated 2012-02-10 and 2012-04-18. WCSLIB version 5.19 (2018/07/27) -------------------------------- * C library - In wcssub(), fixed a bug in handling distortion functions on axes with changed axis number in the subimage (i.e. via deletion or addition of an axis). - In various routines within dis.c, wcs.c, wcshdr.c, and wcspih.l, increased the size of various sprintf() output buffers to avert -Wformat-overflow warnings from gcc 8.1.0 (with -DFORTIFY_SOURCE=2). Reported by Simon Conseil. Also fixed other warnings in these routines from gcc 8.1.0 relating to -Wcast-function-type, -Wmaybe-uninitialized, and -Wunused-parameter. - In wcsutrn.l (the units alias translator used by wcsfix), recognise 'Deg', 'Degree', and 'Degrees' as aliases for 'deg'. Rogue header reported by Jim Lewis. - Added a note to the prologue of spx.h explaining WCSLIB's use of Cox's air-to-vacuum transformation equation rather than the IUGG relation cited in WCS Paper III. Noted by Benjamin Alan Weaver. - In the test suite, avert nuisance compiler warnings in tdis1. Made tsphdpa more robust in handling user coordinate input. * PGSBOX - In pgwcsl_(), avert nuisance warnings from gcc 8.1.0 relating to unused parameters (-Wunused-parameter). Also averted nuisance compiler warnings in cpgtest. * Utilities - wcsware was not reading the -TAB table from the FITS file for alternate descriptions, bug reported by Chiara Marmo. Nor was wcsfix() ever invoked for them. Made it more robust in handling user input of coordinates for the -x and -w options. - Fixed compiler warnings from gcc 8.1.0 in HPXcvt (-Wmaybe-uninitialized), and wcsgrid (-Wformat-overflow). * Installation - Amended configure.ac to allow cross-compilation, and also updated the auxiliary configure scripts in the config/ directory. Patch supplied by Mosè Giordano. WCSLIB version 5.18 (2018/01/10) -------------------------------- * C library - New routines introduced to preclude altering the global variables NPVMAX, NPSMAX, and NDPMAX, which determine how much memory to allocate for storing PVi_ma, PSi_ma, DPja, and DQia keyvalues: wcsinit(), lininit(), lindist(), and disinit(). These are now used by various WCSLIB routines, such as the header parsers, which previously temporarily altered the global variables, thus posing a thread hazard. Testing and feedback on thread-safety issues, with patches, from Rodrigo Tobar Carrizo. - The Flex scanners, fitshdr(), wcsbth(), wcspih(), wcsulexe(), and wcsutrne(), have been rewritten as thin wrappers (with the same API) over scanners that were modified (with changed API) as required to use Flex's "reentrant" option. Consequently, they are now reentrant and should be thread-safe. That also passes through to the deprecated wrappers, wcsulex() and wcsutrn(). - Fixed memory leaks in lindist() and lincpy() uncovered by valgrind. - Test programs tfitshdr, tpih1, tpih2, and ttab3 are now careful to free all allocated memory before exit to defeat spurious reports of memory leaks by valgrind. * Fortran wrappers - New wrappers for wcsinit(), lininit(), lindist(), and disinit(). * Installation - configure now recognises the value of ARFLAGS obtained from the environment. * User manual - Updates and amendments in line with the above changes. - Documentation generation moved to doxygen 1.8.14 (was 1.8.13). WCSLIB version 5.17 (2017/09/18) -------------------------------- * C library - Fixed a memory leak in wcspih(). Reported by Pim Schellart. - Fixed compiler warnings about comparison between signed and unsigned integers in tab.c (Pey-Lian Lim). Also fixed warnings in other functions about unused parameters. * Fortran wrappers - Fixed compiler warnings about comparison between signed and unsigned integers in several routines. * PGSBOX - Fixed a compiler warning about comparison between signed and unsigned ints. * Installation - Removed setgid permission on installation directories (for Fedora Linux, reported by Sergio Pascual). * User manual - Minor updates and amendments. - Documentation generation moved to doxygen 1.8.13 (was 1.8.10). WCSLIB version 5.16 (2017/01/15) -------------------------------- * C library - Bug fix in spcfix() for the previous change. Reported separately by Julian Taylor & Peter Williams. WCSLIB version 5.15 (2016/04/05) -------------------------------- * C library - Bug fix in wcsulex.l for the previous change. Reported, and fix supplied by Tammo Jan Dijkema. - In spcfix(), report the value of VELREF if ctype is translated from the AIPS convention. WCSLIB version 5.14 (2016/02/07) -------------------------------- * C library - In wcsulex.l and wcsutrn.l, applied a workaround for a memory leak introduced by a change (bug) in flex in Aug/2012. Reported, and fix supplied by Thomas Robitaille and Erik Bray. * Installation - In MacOSX, create symlink libwcs.dylib pointing to the dynamic library so that WCSLIB is linked dynamically by default. Requested by Paul Price. WCSLIB version 5.13 (2016/01/26) -------------------------------- * C library - In wcshdo(), provide floating-point format control via the 'ctrl' argument (formerly 'relax'). - In wcspih(), PLATEID by itself is no longer sufficient to trigger a DSS translation (reported by James Allen). - In unitfix(), ensure that the message buffer cannot be overrun, e.g. by blank-padded unit strings (reported by Vishal Kasliwal). WCSLIB version 5.12 (2015/11/15) -------------------------------- * C library - Bug fix in wcshdo() for CRVALia precision reported by Mihai Cara. WCSLIB version 5.11 (2015/10/18) -------------------------------- * C library - Bug fixes in wcspih.l and dis.c for WAT distortions provided by Ole Streicher. WCSLIB version 5.10 (2015/10/09) -------------------------------- * C library - In wcshdo(), allow output of floating point keyvalues to 15 significant digits (was 14), mainly for astropy. - In wcspih(), allow unrecognised WAT projection types (tan, etc.) to pass without returning an error. Reported by Michael Droettboom. Also fixed a bug triggered by SIP keywords in unconventional order, reported by Colin Slater, LSST. WCSLIB version 5.9 (2015/07/21) ------------------------------- * C library - In disx2p(), make proper allowance for the possibility that the TPD and SIP forward and inverse distortion polynomials may not be of the same degree, reported by Martin Kuemmel. - Fix-ups in wcshdo() reported by Michael Droettboom, and several tidy-ups as well. WCSLIB version 5.8 (2015/07/08) ------------------------------- * C library - DSS (Digitized Sky Survey) coordinates are now handled via TPD, as are the TNX and ZPX "projections". New test script tdis3 and headers DSS.keyrec, TNX.keyrec, and ZPX.keyrec. - New function dishdo() can be used to set a flag that causes wcshdo() to write headers in the form of the distortion function used internally (usually TPD). - Added the capability, via DPja.DOCORR, for a distortion function to to compute an additive correction to the undistorted coordinates (rather than computing the distorted coordinates themselves). - Added auxiliary variables to TPD via DPja.AUX.jhat.COEFF.m. - Bug fix in wcshdo() for TPV, diagnosed by Michael Droettboom. * Fortran wrappers - Wrapper for dishdo(). WCSLIB version 5.7 (2015/06/29) ------------------------------- * C library - Extended wcssub() to handle distortions (and thus wcscopy() also). This required axis mapping to be enabled for SIP distortions within WCSLIB. - wcshdo() now handles all distortions currently supported by WCSLIB: SIP, TPV, TPD, and Polynomial. - Bug fixes in sphx2s() and sphs2x() for non-unit vector strides for special-case rotations. - In wcsset(), modify wcsprm::ctype after translating TPV so that subsequent calls won't try to re-translate it, the PVi_ma records by then having been erased. Reported by Michael Droettboom. Also, restore NDPMAX after translating TPV. - Bug fixes in discpy(), disprt(), disset(), and disx2p(). - Added disperr(), prjperr(), spcperr(), spxperr(), and tabperr() to complete the set and make reporting errors slightly more convenient. * Utilities - wcsware has a new option, -o, to print the wcsprm struct in the form of a FITS header using wcshdo(). Also, the -a option has been extended to allow a 0-relative numeric index for selecting an alternate WCS, where the alternates are sequenced alphabetically (without gaps) following the primary representation. * User manual - Documentation generation moved to doxygen 1.8.10 (was 1.8.9.1). WCSLIB version 5.6 (2015/06/14) ------------------------------- * C library - Bug fixes in wcspih() and sipset() to account for the fact that the independent variables of the SIP polynomial are pixel coordinate offsets from CRPIXja, not pixel coordinates per se. Diagnosed by Michael Droettboom. Validated SIP and TPV handling by comparing the output of 'wcsware -x' with that of wcstools 'xy2sky -d -n6' using astropy's SIP test headers, and separate SIP and TPV headers originating from the Palomar Transient Factory provided by David Shupe. Changed SIP.keyrec so that CRPIX1 and CRPIX2 differ in value, thereby making tests sensitive to any confusion between the two. WCSLIB version 5.5 (2015/05/05) ------------------------------- * C library - Bug fixes in wcspih.l for headers with multiple distortions, and for distortion parameter look-alike keywords. - Bug fix in sipset() uncovered by valgrind. WCSLIB version 5.4.1 (2015/05/01) --------------------------------- * C library - Added a fairly lengthy section to the prologue of dis.h describing the Paper IV keywords and the distortion functions currently implemented. * User manual - Added a new section on WCSLIB version numbers. WCSLIB version 5.4 (2015/04/21) ------------------------------- * C library - Further work on distortions: wcspih() now parses Paper IV distortion keywords (CPDISja, CQDISia, DPja, DQia, etc.), thus handling record- valued keywords. SIP keywords are also parsed and translated into Paper IV keywords. - TPV, SIP, and whereever possible, the general Polynomial distortion function of Paper IV are now implemented by the Template Polynomial Distortion (TPD), that being a superset of TPV and SIP. TPD, which can also handle 1D distortions and be used for inversions, is also supported as a separate distortion type defined by Paper IV keywords. TPD efficiently handles 1D distortions and distortions without radial terms. - Specialized inverse distortions, such as defined by SIP, are implemented by TPD and recognized by disx2p(), which uses them to compute the initial approximation of its more precise iterative solution. - Generalized tdis1.c so that it can do closure tests for SIP headers, and added a SIP test header. WCSLIB version 5.3.1 (2015/04/21) --------------------------------- * C library - Bug fix in test program tdis1.c reported by Martin Kuemmel. WCSLIB version 5.3 (2015/04/21) ------------------------------- First public release of WCSLIB 5.x with distortions capability. * C library - Changed disprm::dtype from char[16] to char[72] for reasons relating to header parsing. - More armour plating for disset() and friends. They also use new utility functions wcsutil_dpkey_int() and wcsutil_dpkey_double() to extract numeric values from a dpkey struct. This ensures their independence of the data type, the appropriate reporting of dpkey values by disprt(), and (eventually) the appropriate writing of DPja and DQia keyvalues by wcshdo(). - Augmented the usage comments for dpfill() to explain how numeric values in a dpkey struct are handled. * Utilities - wcsware now uses wcserr to provide a backtrace on errors. Also fixed a couple of minor annoyances relating to alternate representations. WCSLIB version 5.2 beta release (2015/04/15) -------------------------------------------- * C library - Further development of disprm and related functions to implement the FITS keywords for distortions introduced in WCS Paper IV, thus changing disprm's ABI once again. disprm's model is now similar to wcsprm's handling of PVi_ma and PSi_ma, where the parsed keyrecords are loaded into a set of pvcard and pscard structs and wcsset() does the analysis. For disprm, the parsed DPja or DQia keyrecords are loaded into a set of dpkey structs for disset() to analyse. - New function dpfill() aids in filling a dpkey struct. Function disparms() has been removed. It was no longer needed as disprm::parms[][] is now a "returned" member of the struct. - Implementation of the general Polynomial distortion function defined in Sect. 3.1 of WCS Paper IV. The polynomial is defined in terms of Paper IV keywords. - Bug fixes in diswarp() and linwarp() reported by Michael Droettboom. - Test program tdis1 now tests a TPV header for closure in two ways: directly as a specialist TPV distortion (as before), then by translating it into a general polynomial distortion. It then also tests that the TPV and polynomial distortions produce the same results. * Fortran wrappers - Changes to the wrappers reflecting changes to disprm. - Bug fixes in fitshdr_f.c, and test programs tdis1.f, tfitshdr.f, twcsfix.f, and twcs.f. All reported and/or fixed by Ole Streicher. WCSLIB version 5.1 beta release (2015/04/07) -------------------------------------------- * C library - Distortions-related bug fixes to linset(), linp2x(), and linx2p(). - New functions diswarp() and linwarp() compute statistics of the distortion functions over a specified domain. Changed tdis1.c to test them. - Changes to disprm (so changed ABI). * Fortran wrappers - Wrappers for diswarp() and linwarp(). WCSLIB version 5.0 beta release (2015/04/05) -------------------------------------------- * C library - Implemented the framework of WCS Paper IV (the draft distortions proposal) based on a new struct, disprm, and suite of routines with header dis.h: disini(), disalloc(), discpy(), disfree(), disprt(), disset(), disp2x(), and disx2p(). New test program tdis1. Consequent changes to the linprm struct have altered its ABI, thus necessitating an increment in the WCSLIB major verion number. - wcsset() now recognises the "TPV" projection proposed in an early draft of WCS Paper II, and translates it into a disprm distortion - by request of Octavi Fors. Additionally, it recognises "TPU" as equivalent to "TPV" but using a prior distortion (coming before the linear transformation matrix) rather than sequent (coming after it). - In wcspih() and wcsbth(), added relaxation flags to allow PC0i_0ja, PV0j_0ma, and PS0j_0ma (i.e. with leading zeroes on the index). - Added wcslib_version() to return the WCSLIB version number, as suggested by Ole Streicher. - Fixed problems uncovered by valgrind in prjbchk() (reported by Ger van Diepen), sphx2s(), sphx2s(), spcspxe(), spcxpse(), tabini(), and wcshdo_util(). - Tidied up error reporting, particularly relating to translating status returns from lower-level functions. New functions linperr() and celperr() report error messages from the structs they contain in addition to their own. - Changed output formatting of floating point values in linprt(), celprt(), prjprt(), spcprt(), tabprt(), and wcsprt(). Updated the test output reference files for tbth1, tpih1, twcsfix, twcssub, and twcstab to suit. - Tidied up several of the test programs, mostly to free memory explicitly before exit so that valgrind doesn't report (non-)leaks. * Fortran wrappers - Wrappers for the new distortion functions. New test programs tdis1.f and tdis2.f. - Updates following changes to wcspih() and wcsbth(). - Added wrappers for linperr() and celperr(). Also added prjperr_(), spcperr_(), and tabperr_() as convenient wrappers on wcserr_prt(). - Wrapper for wcslib_version(). * Utilities - Added a "lint" function to wcsware to check a FITS header for conformance to the WCS standard. New test program twcslint. * PGSBOX - In PGCRLB, fixed an incorrect use of the MOD intrinsic reported by 'gfortran -std=f95' via Jean-Baptiste Marquette. WCSLIB version 4.25.1 (2015/01/05) ---------------------------------- * C library - Updated the test output reference files for tpih1, tbth1, twcsfix, and twcstab to account for the change to wcsset() in release 4.25. * Fortran wrappers - Updated the test output reference files for tpih1, twcsfix, and twcstab to account for the change to wcsset() in release 4.25. * User manual - Documentation generation moved to doxygen 1.8.9.1 (was 1.8.8). WCSLIB version 4.25 (2014/12/15) ---------------------------------- * C library - wcsset() now supplies default values for the auxiliary keywords EQUINOXa and RADESYSa if not present in the FITS header. WCSLIB version 4.24 (2014/09/19) ---------------------------------- * C library - Changed API to wcscompare() to allow a tolerance to be specified for floating-point comparisons. Contributed by Michael Droettboom. * Fortran wrappers Track the change to wcscompare(). * User manual - Documentation generation moved to doxygen 1.8.8 (was 1.8.4). - Added mention of WCSLIB in "homebrew-science" (MacOSX) in the section on other packages. WCSLIB version 4.23 (2014/05/11) -------------------------------- * C library - New function wcscompare() compares two wcsprm structs for equality with varying degrees of strictness. Test program twcscompare. Contributed by Michael Droettboom. - In wcssub(), fixed a bug uncovered by valgrind arising from allocation of insufficient memory for temporaries when a new axis is added. Reported by Michael Droettboom. - In wcshdo(), don't write RESTFRQ or RESTWAV if zero. Also, to distinguish them from integer keyvalues, floating- point values will now always be written with an exponent or fractional part, ".0" being appended if necessary to achieve this. Suggested by Peter Weilbacher. - Fixed the '-h' option in twcshdr. * Fortran wrappers - Wrapper for wcscompare(). WCSLIB version 4.22 (2014/04/13) -------------------------------- * C library - In pcox2s() and pcos2x(), use alternative projection equations for greater numerical precision near theta == 0. In cops2x(), return an exact result for theta at the poles. Relaxed the tolerance for bounds checking a little in sflx2s(). WCSLIB version 4.21 (2014/03/24) -------------------------------- * C library - New function prjbchk() performs bounds checking on native spherical coordinates. It is invoked automatically by the deprojection (x2s) routines if prjprm::bounds&4 is set. Documented the new bounds checking implemented by prjbchk() in the prologue entry for wcsbchk(). Improvements to tprj1 to test the vector API of prjx2s() and to deal better with out-of-bounds native coordinates returned by it. - Bug fixes in the projection routines: in hpxx2s() relating to bounds checking, bug introduced at 4.20, reported by Michael Droettboom; in parx2s() and molx2s() relating to setting the stat vector; in hpxx2s() relating to implementation of the vector API; and in xphx2s() relating to setting an out-of-bounds value of phi. * Fortran wrappers - Wrapper for prjbchk(). Modified tprj1.f to track changes to the C version. WCSLIB version 4.20 (2013/12/18) -------------------------------- * C library - New function, wcsbchk(), for controlling bounds checking in the projection routines. - Enable bounds checking in the pixel-to-sky (x2s) direction for HPX and XPH if prjprm::bounds&2. Tightened bounds checking in xphx2s(). prjini() now sets prjprm::bounds = 3 to enable all bounds checking by default. - Fixed an incorrect error message in wcs_units(). Also report potentially unsafe units translations in unitfix() - both contributed by Michael Droettboom. * Fortran wrappers - Wrapper for wcsbchk(). * PGSBOX - Fixed a few nuisance warnings from gfortran 4.7.2 relating to implicit type conversions in pgsbox.f. * User manual - Added mention of wcsjs (Javascript) in the section on other packages. WCSLIB version 4.19 (2013/09/30) -------------------------------- * C library - Bug fix in wcshdo(), uncovered by cppcheck and reported by David Binderman. Fixed additional minor inconsistencies in hpxx2s(), wcsprintf(), and wcsfprintf() reported by cppcheck. - Minor fix to twcstab reported by cppcheck. - Bug fix in wcssub() for handling (non-standard) PROJPn keywords (uncovered by valgrind, reported by Paul Price). WCSLIB version 4.18 (2013/07/13) -------------------------------- * C library - Implemented the butterfly projection (XPH), being the polar form of the HEALPix projection with (H,K) = (4,3). Augmented tprj1.c and tprj2.c to suit. - Bug fix in celfix() when translating GLS to SFL with non-zero reference point. * Fortran wrappers - Wrappers for the XPH projection functions and corresponding modifications to the test programs. - Fixed a few inconsequential warnings from gfortran 4.7.2 relating to implicit type conversions in the test programs. * Utilities - In HPXcvt, fixed incorrect axis scaling (CDELT1 and CDELT2) in the XPH header, and set the PCi_ja matrix in the HPX header to a pure 45 degree rotation with appropriate adjustment of CDELT1 and CDELT2 (matching XPH). Also set LONPOLE to 180 degree in the XPH header with adjustment of CRVAL1 as recommended in the errata. These changes prompted by Paddy Leahy. Also, modified the FITS header comment for XPH - it is no longer "experimental", and accept the '-x' option (i.e. without qualification) as equivalent to '-xn'. * User manual - Documentation generation moved to doxygen 1.8.4 (was 1.5.6). WCSLIB version 4.17 (2013/01/29) -------------------------------- * C library - Added wcsfprintf() to wcsprint.h. Now used in wcsbth() and wcspih() to allow diagnostic output to be redirected. Changes provided by Michael Droettboom. WCSLIB version 4.16 (2012/11/07) -------------------------------- * C library - When wcspih() constructs a default coordinate representation it will give it the special name "DEFAULTS", and will not report "Found one coordinate representation" (if reporting is enabled). * Utilities - wcsware has a new option, -P, which does the same as -p except that it won't print a wcsprm struct with the name "DEFAULTS". WCSLIB version 4.15 (2012/09/26) -------------------------------- * C library - Bug fixes in spctype(), spcspxe(), spcxpse, and spctrne() for propagating an error status correctly from lower-level routines. Amendments to the prologues of these routines. Reported by Hans Terlouw. - Similarly for wcsunitse(), wcsulexe(), and wcsutrne(). * PGSBOX - Bug fix in PGSBOX for handling cycles in angle when both world coordinate elements are angular. Reported by Thomas Robitaille. WCSLIB version 4.14 (2012/07/13) -------------------------------- * C library - Problems were caused for fitshdr(), wcsbth(), wcspih(), wcsulex(), datfix() and wcshdo(), by locales such as "fr_FR" in which commas are used to delimit the decimal part of floating point numbers. In particular, these locales adversely affect the behaviour of sscanf() and sprintf() when reading and writing FITS header keyvalues. Thread-safe fixes provided by Michael Droettboom. - Applied astropy patches from Michael Droettboom: attend to compiler warnings in prj.c, spc.c, tab.c, and wcsutil.c, including those for MS-Windows. WCSLIB version 4.13.4 (2012/04/02) ---------------------------------- * Installation - Relaxed the closure tolerance slightly in tlog.f as for tlog.c previously. WCSLIB version 4.13.3 (2012/03/26) ---------------------------------- * Installation - Relaxed the closure tolerance slightly in tlog.c for gcc 4.6.3 on Ubuntu 12.04 (reported by Ole Streicher). WCSLIB version 4.13.2 (2012/03/21) ---------------------------------- * Installation - Changes to configure.ac and the GNUmakefiles to put '-lm' strictly in the correct sequence when producing the sharable library (reported by Ole Streicher). WCSLIB version 4.13.1 (2012/03/15) ---------------------------------- * C library - Workaround in wcserr_set() for an unfortunate compiler segv from gcc 4.2.1 in MacOSX 10.7. WCSLIB version 4.13 (2012/03/14) -------------------------------- * C library - Allow naxis == 0 in wcsini() and linini() for a degenerate coordinate system as may be produced by wcssub(). In wcssub(), ensure that wcsini() is called for coordinate systems with naxis == 0. In wcssptr(), call spcfree() before spcini() to plug a memory leak. WCSLIB version 4.12 (2012/02/29) -------------------------------- * C library - In spctrne(), guard against restfrq == restwav == 0.0 when translating between two velocity-characteristic types, or between two wave-characteristic types (the translation is independent of restfrq and restwav, but a dummy value is needed for intermediate calculations). WCSLIB version 4.11 (2012/02/21) -------------------------------- * C library - Bug fix in spcset() for handling simple linear spectral axes. * Fortran wrappers - Bug fix in spctrne_() for handling ctypeS2. WCSLIB version 4.10 (2012/02/06) -------------------------------- * C library - datfix() and spcfix() now return informative messages when dates and AIPS-convention spectral axes are translated (changes contributed by Michael Droettboom). spcaips() now returns an error status for invalid values of VELREF. - wcssub() has been augmented with the ability to add new axes onto a wcsprm struct. WCSLIB version 4.9 (2012/01/24) ------------------------------- * C library - Fixes to wcsfixi() for collecting the messages properly in the info array (from Michael Droettboom). - Handle certain malformed date strings more gracefully in datfix(). - Make informative messages printed by wcserr_prt() a bit more informative. WCSLIB version 4.8.4 (2011/12/05) --------------------------------- * C library - Fixed the pseudo-random number generator in twcstab.c - gcc 4.6 with '-O2' baulked at testing for signed integer overflow. * Installation - In configure.ac, the Fortran compiler's libraries must be added to the link list when checking for the PGPLOT libraries since gcc is driving the linker. Likewise in C/GNUmakefile when linking test programs that use PGPLOT. - Use 'make CHECK=nopgplot check' to run only the non-graphical tests (even if PGPLOT is available). - After compiling and running the tests, 'make check' now summarizes the non-graphical test results and stops if any failed. WCSLIB version 4.8.3 (2011/11/17) --------------------------------- * C library - Minor generalization of the wcserr diagnostics to allow the return of informative messages, which are associated with negative status values. wcserr_prt() will now recognize and print them as such. Added wcserr_clear() to reset (clear) a wcserr struct. - Modified unitfix() to return an informative message if a units alias is applied, and wcsfixi() to allow such messages to be propagated through the info array (from Michael Droettboom). - Modified twcsfix.c to use wcserr diagnostics, in particular to report units alias translations. * Fortran wrappers - In wcsfix_(), interpret *naxis == 0 as meaning naxis == 0x0, thus causing cylfix() to be skipped. - Modified twcsfix.f to reflect changes made to twcsfix.c. WCSLIB version 4.8.2 (2011/10/04) --------------------------------- * Installation - Changes for Debian package generation contributed by Ole Streicher: - Corrections to 'configure' reported by 'lintian'. - Generate man pages for the utility programs and install them. WCSLIB version 4.8.1 (2011/09/19) --------------------------------- * Installation - Set SONAME in the sharable library in accordance with tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html (reported by Ole Streicher, Debian package maintainer). The sharable library will again be installed with full release number and with a symbolic link from SONAME pointing to it. If defined, SHRLN will point to SONAME. WCSLIB version 4.8 (2011/08/15) ------------------------------- * C library - New error diagnostics mechanism contributed by Michael Droettboom: Most functions that return a numeric status (error) code now also write a detailed error message to a wcserr struct attached to the passed-in *prm struct. See wcserr.h for more information. Functions that didn't have a *prm struct as an argument have no direct way to return an error message. Therefore, these functions now have duplicate versions with the suffix "e" that take an additional "struct wcserr *" parameter. These functions are: spcspx() -> spcspxe() spctrn() -> spctrne() spctyp() -> spctype() spcxps() -> spcxpse() wcsulex() -> wcsulexe() wcsunits() -> wcsunitse() wcsutrn() -> wcsutrne() A new function wcsfixi() was added which is identical to wcsfix() but in addition stores all of the detailed textual messages about the fixes that were performed. - In wcssub(), ensure that wcstab->m_tab has been initialized before trying to free it on status return 12 or 13 (reported by Hans Terlow). - Bug fixes: - In sphx2s() and sphs2x() for the case where |eul[1]| = 180.0. - For parsing AIPS-convention VELREF in wcsbth(). - In spcaips() for translating AIPS-convention CTYPEia without Doppler frame. - Non-graphical test programs now simply report "PASS" if they satisfy the reporting tolerance for closure residuals, etc. Their full output is reported otherwise. Run 'make MODE=interactive check' to revert to the previous behaviour of reporting the full output for tests that succeed. - Eliminated compiler warnings about type-punning of pointer-to- function. * Fortran wrappers Extensive modifications to track the new error handling mechanism in the C library. * Installation - configure now prefers gfortran over g77 if available. - Don't rely on "." being in the PATH if config.status needs to be run in the pgsbox and utils makefile (reported by Peter Teuben). WCSLIB version 4.7 (2011/02/07) ------------------------------- * C library - Bug fix in celset() for interpreting LATPOLEa when LONPOLEa = phi0. Crept in at version 4.4. - Fixed the bounds test on y in hpxx2s() (HEALPix projection) for unconventional values of H and K. In hpxx2s() and hpxs2x(), corrected the offset of the southern polar half-facets for even K. In hpxs2x(), put the phi = 180 meridian in the expected place. - Bug fixes in tabx2s() and tabs2x() for default indexes (reported by David Berry). In tabs2x(), if no solution is found then do minor extrapolation past the ends of each row (1-D case only). Sped up tabs2x() by about 50%. - New functions wcsprintf(), wcsprintf_set(), and wcsprintf_buf(), declared in wcsprintf.h, provide control over the disposition of output from celprt(), linprt(), prjprt(), spcprt(), tabprt(), and wcsprt() routines. Prompted by Michael Droettboom, with an initial implementation. * Fortran wrappers - In the various test programs, used EQUIVALENCEs to ensure that the CEL, LIN, PRJ, etc. arrays are aligned on a DOUBLE PRECISION boundary. * PGSBOX - Bug fix for the case where NG1 == 0 and GRID1(0) < 0, and likewise for NG2 and GRID2. * Utilities - In wcsware, added a '-w' option to convert world coordinates obtained from stdin to pixel coordinates using wcss2p(). Allow multiple sets of input coordinates with the '-x' and '-w' options and report the value of the intermediate world coordinates. * User manual - Fixed list formatting for function return values < 0 or > 9. - New section for wcsprintf() and related routines. * Installation - Changes prompted by Sébastien Fabbro for the Gentoo Linux package: a) autoconf updates, b) respect LDFLAGS when building the shared library, c) install documentation, d) recognise DESTDIR for doing a staged installation. - As of this release, the minor WCSLIB version number (second field) will be incremented if and only if a change is made that affects the library itself, not the documentation or utilities. The version number on the installed libraries and header files will omit the patch number (third field). WCSLIB version 4.6.3 (2010/11/24) --------------------------------- * C library - Bug fix in wcsbth() for handling the inheritance of image header keywords (uncovered by valgrind, reported by Jim Lewis). WCSLIB version 4.6.2 (2010/11/22) --------------------------------- * C library - Fixed a memory leak in wcsbth.l (reported by Jim Lewis). WCSLIB version 4.6.1 (2010/11/18) --------------------------------- * Fortran wrappers - Fixed typos in cel_f.c, celget[cdi] -> celgt[cdi]. WCSLIB version 4.6 (2010/11/16) ------------------------------- * C library - In wcsulex.l and wcsutrn.l, stdlib.h must be included explicitly before the redefinition of exit() - most versions of flex do include it upfront but some don't (reported by Peter Williams). * Fortran wrappers - Changes intended to avert nuisance compiler warnings that could potentially obscure warnings indicative of a genuine problem: - To stop messages about unused variables when the relevant compiler option is set, e.g. 'g77 -Wunused', the various *_ERRMSG arrays defined in the Fortran include files and (formerly) initialized therein via DATA statements, e.g. PRJ_ERRMSG in prj.inc, have now been placed into COMMON blocks with names such as PRJ_DATA, and are initialized via DATA statements in BLOCK DATA subprograms defined in separate files, e.g. prj_data.f. - To stop messages about subroutines being invoked with inconsistent argument lists if the relevant compiler option is not set, e.g. 'g77 -Wno-globals', the C wrapper functions that take 'void *' arguments now have separate forms for INTEGER, DOUBLE PRECISION, and CHARACTER arguments that simply invoke the generic function. Application code must be modified to take advantage of this. * User manual - In the section on the Fortran wrappers in the manual, warn about the need for the INTEGER array holding a data structure to be aligned on a DOUBLE PRECISION boundary. WCSLIB version 4.5.6 (2010/10/28) --------------------------------- * Installation - Fixed the search for CFITSIO and PGPLOT library and include directories. WCSLIB version 4.5.5 (2010/10/14) --------------------------------- * Installation - Build the PGSBOX sharable library. WCSLIB version 4.5.4 (2010/09/28) --------------------------------- * C library - In wcshdo(), according to the FITS standard, "Letters in the exponential form ('E' or 'D') shall be upper case" (reported by Michael Droettboom). WCSLIB version 4.5.3 (2010/09/23) --------------------------------- * Utilities - Various improvements to wcsgrid: correct the scaling set via cpgwnad(); label angles other than RA,Dec in decimal degrees; draw the projection boundary for projections other than zenithals. WCSLIB version 4.5.2 (2010/09/23) --------------------------------- * C library - Fixed the translation of GLS to SFL in wcsset() and celfix() when the reference longitude is non-zero - it introduces an offset in longitude in the normal way. (This undoes part of the change applied in version 4.4.) WCSLIB version 4.5.1 (2010/08/12) --------------------------------- * C library - New utility function, sphpad(), computes the coordinates of points offset by given angular distances and position angles from a given point on the sky (complementary to sphdpa()). * Fortran wrappers - New wrapper function: - SPHPAD for sphpad(). WCSLIB version 4.5 (2010/07/16) ------------------------------- * C library - Fixed the interpretation of VELREF when translating AIPS-convention spectral types. Such translation is now handled by a new special- purpose function, spcaips(). The wcsprm struct has been augmented with an entry for velref which is filled by wcspih() and wcsbth(). Previously, selection by VELREF of the radio or optical velocity convention for type VELO was not properly handled. * Fortran wrappers - New wrapper function: - SPCAIPS for spcaips(). - Changed spc.inc, spc_f.c, wcs.inc and wcs_f.c to track VELREF changes. - Declared functions external in the include files to avoid compiler warnings about unused variables (if the particular option is set). * Utilities - Added a '-q' option to fitshdr to quit after a specified number of HDUs. WCSLIB version 4.4.4 (2009/09/14) --------------------------------- * Installation - Added more configure options for controlling the build: --disable-fortran, --disable-utils, --without-cfitsio, and --without-pgplot. WCSLIB version 4.4.3 (2009/09/03) --------------------------------- * C library - Set wave number units to "/m" in spctyp(), was "1/m" which is not strictly legal and wasn't handled by wcsulex() (reported by Hans Terlow). Also fixed a number of units specifications in the prologue of spx.h to conform with Paper I usage. - In wcsulex(), allow unit strings like "1/m" in addition to "/m", provided that the superfluous "1" is the first non-blank character in the expression, or parenthesised sub-expression. - In wcssptr(), ensure that i is always reset if given < 0. * User manual - Augmented the list of FITS WCS and related software in the manual. WCSLIB version 4.4.2 (2009/08/13) --------------------------------- * C library - In sphx2s() and sphs2x(), handle the case where |eul[1]| = 180.0 separately for speed and accuracy. This change also fixes a rare and subtle bug in cels2x() that occurs when celprm::isolat is set and the magnitude of the first latitude in the lat[] vector exceeds 90 deg (reported by Hans Terlouw). * Installation - Fix relating to creation of symlinks when installing the libraries. WCSLIB version 4.4.1 (2009/08/11) --------------------------------- * Installation - Fixes for installation of the CHANGES file and for the creation of a symbolic link for the sharable library if one already exists. WCSLIB version 4.4 (2009/08/10) ------------------------------- * C library - Creation of WCSLIB user manual from the header file prologues using a special-purpose parser, doxextr, and sed scripts to generate input for doxygen. This required minor formatting changes to all prologues plus miscellaneous changes such as naming of arguments in function prototypes. - Bug fix in wcsset() that affected handling of PROJPn (deprecated) and PVi_ma attached to the longitude (not latitude) axis. Guard against long strings when copying the projection code. In wcs_types(), allow for early Paper IV distortion codes (e.g. "RA---TAN-SIP") when parsing CTYPEia. - Use sincos() whereever possible for a ~15% speedup (patches for cel.c, prj.c and sph.c supplied by Michael Droettboom). configure checks for, and uses it automatically if available. - Fixed the translation of GLS to SFL in wcsset() and celfix() when the reference longitude and latitude are non-zero. (In the AIPS convention, this simply translates the reference point, i.e. the map as a whole, to those coordinates without creating an oblique grid.) - Bug fix in prjoff(), a utility function used by the prj routines. It forces (x,y) = (0,0) at (phi_0,theta_0) when the latter are set by PVi_[012]a attached to the longitude (not latitude) axis. Rarely used in practice. - New utility function, sphdpa(), computes the distance and position angle from a point on the sphere to a set of field points. - In sphx2s() and sphx2s(), handle a simple change in origin of longitude using a short-cut calculation for speed and accuracy. Similarly in celset(), check whether phip == phi0 when computing latp and if so use a short-cut that ensures latp == 90.0 (exactly) if lat0 == theta0. The resulting spherical rotation then becomes a simple change in origin of longitude. In particular, these changes should assist PGSBOX in drawing grid lines of +/-180 longitude, to prevent flip-flopping between one and the other. - wcsbth() & wcspih(): resolved an inconsistency between the documentation and code by renamimg WCSHDR_VSOURCEa as WCSHDR_VSOURCE. - Flex code: moved declaration of helper functions out of global scope. - Fixed the call to wcss2p() in twcshdr (in a section of code not usually exercised). * Fortran wrappers - New wrapper functions: - WCSBTH for wcsbth(), - WCSBDX for wcsbdx(), - CDFIX for cdfix(), - SPHDPA for sphdpa(). - Updated WCSLEN (in wcs.inc) and added WCS_COLAX and WCS_VELANGL to match changes to wcsprm made in v4.3 with corresponding changes to the wrapper functions. Likewise updated TABLEN (in tab.inc) for changes to tabprm, and added CEL_LATPREQ for celprm. - Struct lengths (WCSLEN, PRJLEN, etc.) are now long enough to accomodate 64-bit machines. - Updated the flag bits for the RELAX argument in wcshdr.inc to reflect changes to wcshdr.h made in v4.3. Renamed WCSHDR_VSOURCEa to WCSHDR_VSOURCE for consistency with the C library. * PGSBOX - Improved grid labelling, particularly in minimizing the number of fields required in sexagesimal labels. * Utilities - New utility program: - wcsware extracts the WCS keywords for an image from the specified FITS file, constructs wcsprm structs for each coordinate representation found, and performs a variety of operations using them. - Old utility programs (first appeared in 4.3 but were not recorded): - HPXcvt reorganises HEALPix data into a 2-D FITS image with HPX coordinate system. - wcsgrid extracts the WCS keywords for an image from the specified FITS file and uses pgsbox() to plot a 2-D coordinate graticule for each alternate representation found. - fitshdr lists headers from a FITS file specified on the command line, or else on stdin, printing them as 80-character keyrecords without trailing blanks. * Installation - New configure options, --with-pgplotinc, --with-pgplotlib, --with-cfitsioinc and --with-cfitsiolib allow additional directories to be added to the library and include file search path. - Miscellaneous fixes and improvements to the installation process. - Generate a metadata file for pkg-config. - Added 'make MODE=interactive check' to run the test programs in interactive mode rather than batch. - Merged the separate CHANGES files for C, Fortran and PGSBOX into one (this), with a new section for utilities. WCSLIB version 4.3.3 (2009/04/30) --------------------------------- * C library - fitshdr.l, wcsbth.l, and wcspih.l: use setjmp/longjmp to preempt the call to exit() which is hard-coded in function yy_fatal_error() supplied by flex. - wcspih.l: if NAXIS is non-zero but there were no WCS keywords at all in the header then create a default WCS with blank alternate version. WCSLIB version 4.3.2 (2009/03/16) --------------------------------- * C library - utils/GNUmakefile: create BINDIR if necessary prior to installing utilities. WCSLIB version 4.3.1 (2008/09/08) --------------------------------- * Installation - Top-level GNUmakefile: install header files. WCSLIB version 4.3 (2007/12/27) ------------------------------- * C library - A new general WCS header parser wcsbth() handles binary table image arrays and pixel lists as well as image array headers. Added "colax" to the wcsprm struct to record the column numbers for each axis in a pixel list. - New function wcsbdx() is the analog of wcsidx() for the array of wcsprm structs returned by wcsbth(). - New function wcshdo() writes out a wcsprm struct as a FITS header. - Changes to wcspih(): - Bug fix, check for a == 0 (indication of a keyword that applies to all alternates) in internal helper function wcspih_naxes() (reported by Craig Markwardt). - Added a new ctrl option to remove valid WCS keyrecords except for those with a more general role, namely {DATE,MJD}-{OBS,AVG} and OBSGEO-{X,Y,Z} (suggested by Jim Lewis). - Added a rule for VELANGLa. Also added "velangl" to the wcsprm struct. - Do checks on the i, k & m keyword parameters in . - Fixed the test for repeated blanks in the NAXIS and WCSAXES patterns. - Fixed three rules to allow m == 0. - Reworked the implementation notes in the prologue. - The flex scanners, fitshdr.l, wcsbth.l, wcspih.l, wcsulex.l, and wcsutrn.l, invoke yylex_destroy() before returning to avoid a 16kiB memory leak. This was reported by several people, however it may be problematic depending on the version of flex used - version 2.5.9 or later is required. If this is not available, C sources pre- generated by flex 2.5.33 will be used. - In wcs.c, don't define the signbit macro if already defined (for MacOSX). - In wcs.h, documented wtbarr namespace issues in C++. - In wcsset(), always set wcsprm.cunit[i], if possible (primarily for use by wcshdo()). - In wcsfix.c, parenthesised a boolean expression that was otherwise incorrect. - Fixed an obscure floating point rounding error in celset() that appeared with -O2 optimization in gcc v3.3.5 (Linux). - prjset() now correctly propagates the status value returned by the specific projection-setting functions (reported by Bill Pence). - Bug fix in hpxx2s(), also added bounds checking. Minor efficiencies in carx2s() and merx2s(). - In the various functions that print the contents of the structs, use the "%p" printf conversion specifier to print addresses rather than casting the pointer to int and using "#x". The latter does not work on 64-bit machines where sizeof(int) != sizeof(void*). - Reorganized the various structs to get alignment on 64-bit machines. - All header file prologues now reference the README file for an overview of the library. - Miscellaneous portability fixes for 64-bit, MacOSX, OSF compiler, etc. - Elimination of compiler warnings, e.g. parenthesised assignments used as truth values (a favourite gcc gripe!), etc. - Process flex descriptions using a newer version of flex, primarily for MacOSX. However, the processed files are now only used when flex 2.5.9 or later is not available. - Removed WCSLIB 2.x backwards-compatibility measures from lin.h, prj.h, prj.c, and sph.h. * Fortran wrappers - (No substantive changes.) * PGSBOX - Miscellaneous improvements to PGSBOX. * General - Switched licensing to LGPL 3.0. - In comment text, replaced use of the obsolete term "card" with "keyrecord" which consists of a "keyword", "keyvalue", and "keycomment". * Installation - General improvements to the installation process: autoconf-related portability improvements, particularly relating to Fortran name mangling; makefile rules for building the shared library, for processing flex descriptions; don't rely on "." being in the PATH when running tests. WCSLIB version 4.2 (2005/09/23) ------------------------------- * C library - Brought the installation process under control of GNU autoconf, the top-level makefile now builds and tests everything, and the C library has a config.h in which WCS_INT64 is set. Added an INSTALL file. - Merged the FORTRAN, C and PGSBOX READMEs into one top-level README. - Extensions for -TAB coordinate handling: in tabx2s() and tabs2x(), allow extrapolation by half a cell at either end of the index and coordinate tables; fits_read_wcstab() (in getwcstab.{h,c}) allows TDIMn to be omitted for 1-D lookup tables for which it has the form '(1,K)', i.e. describing a degenerate 2-D array; wcsprt() now prints the wtbarr structs in wcsprm. - Bug fixes for -TAB coordinate handling: in tabx2s() and tabs2x() the incorrect indexing variable, m instead of i, was used for tab->crval[]; wcsp2s() and wcss2p() returned prematurely in the tabular coordinate loop; in wcstab(), removed an extraneous assignment to wtbp->kind for index arrays. - In wcsp2s() and wcss2p(), elements of the stat[] vector that had been set were being reset incorrectly to zero. The stat[] values are now set as flag bits for each coordinate element. - Added cdfix() to the wcsfix() suite to fix erroneously omitted CDi_ja cards. - PGSBOX is now compiled into a separate object library, and is installed alongside WCSLIB. - Eliminated several instances of non-ANSI C library functions and header files and some residual K&R C usage. The Sun C compiler complained about const int definitions of initializers used in variable declarations in some of the test programs; changed these to preprocessor macros. * Fortran wrappers - Fixed handling of 64-bit integer keyvalues in keyget_(). - Fixed output formatting of 64-bit integer keyvalues in tfitshdr.f. - Fixed minor syntax errors in twcsfix.f and tpih1.f reported by the Sun Fortran compiler. - The output of each test program now identifies the source file. * PGSBOX - (No substantive changes.) WCSLIB version 4.1 (2005/08/31) ------------------------------- * C library Summary of added functionality: - -TAB coordinate axes are now fully implemented in the WCSLIB driver functions (in wcs.{h,c}); multiple -TAB axes are supported. A new function, wcstab(), which is automatically invoked by wcspih(), parses -TAB-related header cards and sets up structs for a separate routine that reads the necessary arrays from a FITS binary table extension. An implementation of this routine in CFITSIO, fits_read_wcstab(), is provided. Note however that the interface of this function is experimental, and the code itself must be considered beta-release in WCSLIB 4.1. - Units specifications, either from CNAMEia or inline comments (with brackets), of arbitrary complexity are now fully implemented via a parser, wcsulex(), and converter, wcsunits(). This is invoked automatically by wcsset(). - Translators for non-standard WCS constructs are provided. These cover date formats, units specifications, defunct celestial projection types, AIPS spectral axis types, and the repair of malformed cylindrical coordinate systems. - wcspih() now has options to remove the WCS cards it has processed from the header and a new generic FITS header parser, fitshdr(), may be used to parse the remaining non-WCS cards. In addition to the more basic types, it handles 64-bit and 'very long' (70 digit) integer keyvalues, and also continued string keyvalues. It also does keyword matching and extracts units specifications in inline comments. - -LOG coordinates are now implemented independently of spectral coordinate types. Multiple -LOG axes are supported. - New function wcssptr() translates the spectral axis in a wcsprm struct to the required type. - The README file now gives an introduction to, and complete overview of, WCSLIB. It provides a point of entry to programming with WCSLIB. Complete descriptions and usage notes for all functions are contained in the header files. - The FORTRAN wrappers and test programs are now completely up-to-date with respect to the C implementation. - All code, including the FORTRAN wrappers, PGSBOX, and all test programs, now pass 'purify' without memory leaks, uninitialized memory reads, memory access violations, or other memory faults. Change notes: - Added options to wcspih() to remove WCS cards from the input header leaving only non-WCS cards behind. Modified test programs tpih1.c and tpih2.c to use CFITSIO optionally via preprocessor macro DO_CFITSIO. - New function wcstab() in wcshdr.{h,c} parses -TAB-related header cards and sets up structs for a separate routine that reads the necessary arrays from a FITS binary table extension. New test/demo program twcstab.c using header defined in wcstab.cards. - CFITSIO implementation, fits_read_wcstab() in getwcstab.{h,c}, of a function, independent of WCSLIB, for extracting arrays from a binary table as required in constructing -TAB coordinates. - New units specification parser, wcsulex() in wcsunits.h and wcsulex.l, and converter, wcsunits() in wcsunits.{h,c}. New test/demo program tunits.c. - New parser for non-standard units specifications, wcsutrn() in wcsunits.h and wcsutrn.l, also tested by tunits.c. - New functions datfix(), unitfix() (which applies wcsutrn()), celfix(), and spcfix() join cylfix() in wcsfix.{h,c} to translate various forms of non-standard or quasi-standard FITS WCS keyvalues in a wcsprm struct. wcsfix() applies all of these in sequence. New test/demo program twcsfix.c, with wcsfix() also now invoked by tpih1.c. - New generic FITS header parser, fitshdr() in fitshdr.{h,l}. New test/demo program tfitshdr.c uses wcs.cards with extra non-WCS cards added. - -LOG coordinates are now treated as a coordinate type separate from spectral coordinates, implemented via log.{h,c} and test program tlog.c. The logarithmic functions were removed from spx.{h,c}, and spc.c. - Extensive changes to wcs.{h,c} to support multiple -TAB and -LOG coordinate axes and units conversion. Substantially changed the test program, twcs.c, to test the more general functionality. - New function wcssptr() in wcs.{h,c} translates the spectral axis in a wcsprm struct. - Added DATE-AVG to wcsprm. Also ntab, tab, nwtb, and wtb required for -TAB implementation. Define struct wtbarr. - Added a types[] member to the wcsprm struct to identify axis coordinate types using a four-digit code. - Use memset() in wcsini() to null-fill character arrays in the wcsprm struct so that they don't appear to be padded with garbage when displayed by gdb. - Do alias translation for AIPS-convention spectral types in wcsset() using spctyp(). If wcsset() finds a CTYPEia in "4-3" form with an unrecognized algorithm code it now returns an error rather than assume that it's a linear axis. wcsset() now also resets lonpole and latpole to the values actually used. - Modified spctyp() to translate AIPS-convention spectral ctypes, and modified the argument list to return the parsed spectral type and algorithm code. The return arguments will not be modified if CTYPEia is not a valid spectral type; zero-pointers may be specified for any that are not of interest. Removed the external const variables, spc_codes and spc_ncode, as their function is now fulfilled by spctyp(). - Fixed a bug in spctrn() in resolving ctypeS2 wildcarding. - Added latpreq member to the celprm struct, set by celset() to indicate how LATPOLE is used. Augmented tcel2.c to report it. - New function tabmem() in tab.{h,c} takes control of user-allocated memory. - tabini() allows K == 0 and also K[m] == 0 to initialize partially the tabprm struct (for wcstab()). It now does fine-grained bookkeeping of memory allocation for the index arrays and allocates each individually. tabprm.index[] == 0x0 is recognized as default indexing in tabset(), tabx2s() and tabs2x(). - The *prt() functions report parameters to an extra decimal place. - tabprt() prints the array index for elements of the coordinate and index vectors. - Set the 0th element in all *_errmsg arrays to "Success". - Extracted string utility functions used by WCSLIB into wcsutil.{h,c}. - Removed support for K&R C. * Fortran wrappers - The FORTRAN wrappers and test programs are now completely up-to-date with respect to the C implementation. - New include files, wrappers, and test programs: fitshdr.inc, fitshdr_f.c, getwcstab.inc, getwcstab_f.c, log.inc, log_f.c, sph.inc, tab.inc, tab_f.c, tfitshdr.f, tlog.f, ttab1.f, ttab2.f, ttab3.f, tunits.f, twcsfix.f, twcstab.f, wcsfix.inc, wcsfix_f.c, wcsunits.inc, wcsunits_f.c. - Updates to reflect changes to the C library and test programs: cel.inc, cel_f.c, prj.inc, spc.inc, spc_f.c, spx.inc, spx_f.c, tlin.f, tpih1.f, tpih2.f, tprj1.f, tprj2.f, tspc.f, tsph.f, tspx.f, twcs.f, twcsmix.f, twcssub.f, wcs.inc, wcs_f.c, wcshdr.inc, wcshdr_f.c. - Added *_ERRMSG arrays containing status messages to all include files. - Removed support for K&R C. * PGSBOX - Fixed a subtle though benign memory fault identified by 'purify'. - Reset LATPOLE in the COE example in cpgtest.f when drawing the second (native) grid because it will have been set to a non-default value by wcsset() when the first grid was drawn; set wcs.flag to -1 before wcsinit() and call wcsfree() at the end. Similarly for pgtest.f. WCSLIB version 4.0 (2005/02/07) ------------------------------- * C library - Implemented tabular coordinates (-TAB). New files: tab.h and tab.c, and test programs ttab[123].c. These have not been incorporated into the higher-level (wcs.h) functions at this stage. - New spectral functions: spchek() checks a spectral algorithm code for legitimacy; from the spectral keywords given, spcspx() derives the corresponding CRVALi and CDELTi keywords for the underlying P-, and X-type spectral coordinates; spcxps() does the opposite; spctrn() combines spcspx() and spcxps() to translate one set of spectral keywords into another, e.g. 'FREQ' -> 'ZOPT-F2W'. - Implemented the HEALPix (HPX) projection in the prj functions. - Added a new function, wcsidx(), to return an array that indexes the alternate coordinate descriptions found by wcspih() (suggested by Bill Pence, NASA/Goddard). Modified tpih1.c to exercise it. - In wcsp2s() and wcss2p(), check that nelem equals or exceeds wcs.naxis; emphasised this in the usage notes for these functions in tab.h (suggested by Bill Pence, NASA/Goddard). - Moved the macros used for UNDEFINED values and the corresponding macro test function, undefined(), to wcsmath.h for general use. Previously, UNDEFINED values were only used internally, but they are now visible in some of the structs, particularly values of undefined auxiliary header cards in the wcsprm struct. - Remove const from the double args in the specx() prototype in spx.h to match the definition in spx.c (reported by Bryan Irby, NASA/Goddard). - Fixed the interaction between the FLAVOUR and PGPLOTLIB definitions in the C and FORTRAN Makefiles by introducing a separate variable, DO_PLOTS, to control whether to exercise test programs that require PGPLOT (reported by Bill Pence, NASA/Goddard). * Fortran wrappers - New wrapper defined in wcshdr_f.c: wcsidx_(). Modified test program tpih1.f to use it. * PGSBOX - (No substantive changes.) * General - Changed the copyright notice in all library routines from LGPL to GPL as recommended by the FSF (http://www.gnu.org/licenses/why-not- lgpl.html). * Installation - General improvements to the installation process: fixed the interaction between the FLAVOUR and PGPLOTLIB definitions in the Makefile by introducing a separate variable, DO_PLOTS, to control whether to exercise test programs that require PGPLOT (reported by Bill Pence, NASA/Goddard). Added an "install" target to the Makefile. WCSLIB version 3.6 (2004/08/25) ------------------------------- * C library - New service routine, wcssub() extracts the coordinate description for a subimage from a wcsprm struct. wcscopy() is now implemented as a preprocessor macro that invokes wcssub(). New test program, twcssub.c, tests wcssub(). - In wcspih(): 1) Fixed handling of string-valued keywords where the inline comment contains a single-quote character ('). 2) Fixed the address arithmetic for EPOCH and VELREF. 3) Translate VSOURCEa into ZSOURCEa if required. 4) Recognize SSYSSRCa. 5) Support free-format string keyvalues, as well as integer and floating-point keyvalues; documented this in the prologue of wcshdr.h. 6) Allow header cards without inline comments. 7) Fixed function prototyping in wcspih.l (i.e. ANSI and non-ANSI forms were potentially mixed). 8) Catch an unhandled newline character on the END card that was echoed to stdout. 9) In error messages, print "ERROR" (uppercase) - POSIX standard. - Modified wcs.cards to explain and test free-format keyvalues, and also augmented the inline comment on illegal WCS cards that are to be rejected, and WCS-like cards to be discarded. Added a header card with no inline comment. - Removed vsource from the wcsprm struct and added ssyssrc. - In wcsini(), fixed a problem with memory management for wcs.pv when NPVMAX is zero; likewise for wcs.ps and NPSMAX. - In wcsprt(), don't print auxiliary coordinate system information in arrays with zero address. - In wcss2p(), status == 9 (one or more invalid world coordinates) was not returned appropriately. - Renamed twcs1.c to twcs.c, and twcs2.c to twcsmix.c. - "Error status/code/number" is now referred to consistently as the "status return value". - Some vestiges of K&R C were removed: preprocessor definition of const, and K&R function prototypes. * Fortran wrappers - New wrapper defined in wcs_f.c: wcssub_(). New test program, twcssub.f. - Renamed twcs1.f to twcs.f, and twcs2.f to twcsmix.f. * PGSBOX - (No substantive changes.) * Installation - Worked over the C, FORTRAN, and PGSBOX makefiles, in particular to make them all consistent. WCSLIB version 3.5 (2004/06/28) ------------------------------- * C library - WCSLIB now provides a function, wcspih() implemented as a Flex description, that parses a FITS image header, either that of a primary HDU or an image extension. Given a character array containing the header it identifies and reads all WCS cards for the primary coordinate description and up to 26 alternate descriptions and returns this information as an array of wcsprm structs. A service routine, wcsvfree(), is provided to free the memory allocated by wcspih(). The relevant header file for these functions is wcshdr.h. Test programs, tpih1 and tpih2, are provided to verify wcspih. The first simply prints the contents of the structs using wcsprt(). The second uses cpgsbox() to draw coordinate graticules. A FITS WCS test header has been developed to provide input to these test programs. It is implemented as a list of card images, wcs.cards, one card per line, together with a program, tofits, that compiles these into a valid FITS file. tpih1 uses its own code to read this, whereas tpih2 uses the fits_hdr2str() function from CFITSIO. - Removed twcsprt, tpih exercises wcsprt() much more thoroughly than twcsprt ever did. Modified twcs1 to print the size of the various structs as twcsprt used to. - Although they are not used in any coordinate calculations, the wcsprm struct now provides data members for storing all of the auxiliary FITS WCS header cards defined in Papers I, II, and III, such as WCSNAMEa, EQUINOXa, and CNAMEia. Members are also provided for storing the alternate descriptor code (the "a" in CTYPEia), and the binary table column number. These are supported by the high level WCSLIB routines, wcsini(), wcscopy(), wcsfree(), and wcsprt(). Refer to wcs.h for details. - The number of PVi_ma cards for which wcsini() allocates memory is now set by a global variable, NPVMAX (previously a C-preprocessor macro). This defaults to 64 but may be changed by a new function, wcsnpv(). The wcsprm struct contains a new member, npvmax, that records the value of this number at the time the struct was initialized. This is in addition to npv which records the actual number of cards that were encountered. Similarly, NPSMAX (default 8) is used for the number of PSi_ma cards, and it may be changed via wcsnps(). The axis number, i, in the pvcard struct used for storing PVi_ma cards may now be set to 0 to indicate the latitude axis. - calloc() is now used in place of malloc() in allocating memory for arrays, and inclusion of malloc.h has been replaced with stdlib.h for all platforms. wcsfree() checks that wcs.flag != -1 before testing wcs.m_flag when freeing memory allocated by wcsini() in case the struct is uninitialized. Similarly for linfree(). - In prj.h, renamed C-preprocessor macros INI, PRT, SET, X2S and S2X to PRJINI, PRJPRT, PRJSET, PRJX2S and PRJS2X to reduce the likelihood of namespace clashes. Similarly in spc.h. Also, in prj.c, changed the name of helper routine offset() to prjoff() to reduce the likelihood of global namespace conflicts. - In line with bonx2s() and bons2x(), bonset() now recognizes the equatorial case of Bonne's projection as Sanson-Flamsteed, mainly so that the auxiliary information in the prjprm struct more accurately reflects the truth. Modified tcel2 to exercise this by using an equatorial Bonne projection in place of the Hammer-Aitov. - zpns2x() used prj.w[0] for bounds checking, though this had not been set by zpnset() for polynomials of degree N < 3. Consequently, bounds checking for N < 3 was unreliable (reported by David Berry, STARLINK). - Changed some variable names in tscs2x(), cscx2s(), cscs2x(), qscx2s(), and qscs2x() to match Paper II, and likewise changed some inequality tests in qscs2x() without changing the results. - Minor tidying up of output formatting in prjprt(). - Added the alternate version code to FITS WCS keywords mentioned in comments, e.g. CTYPEi changed to CTYPEia. * Fortran wrappers - New wrappers defined in wcshdr_f.c: wcspih_() and wcsvfree_(), and also a new service function, wcsvcopy_(). New test programs, TPIH1 and TPIH2, being analogues of tpih1 and tpih2. Removed TWCSPRT. - In wcs_f.c, new wrappers wcsnpv_() and wcsnps_(); modified wcsput_() and wcsget_() to handle new members of the wcsprm struct. Also modified wcsput_() to null-fill all char[] members of the wcsprm struct, and likewise wcsget_() to blank-fill them. - Modified wcs.inc to support changes to the wcsprm struct. * PGSBOX - In PGSBOX, increased the dimension of the WORLD and XY vectors from 2 to 9 to accomodate higher-dimensional coordinate representations of up to 9 elements. Similarly for pgwcsl(). The assumption (presently) is that the first two world, and pixel, coordinate elements are the relevant ones; the others are all set to zero when pgwcsl() initializes and otherwise ignored. Assigned some variables in DATA to stop compiler messages about uninitialized variables. - Generalized the Makefile, bringing it into line with the WCSLIB Makefile, and adding separate targets for compiling and running the test programs. The default target now simply compiles pgsbox.c and cpgsbox.c. A separate target compiles pgwcsl.c and inserts it into ../C/libwcs.a. WCSLIB version 3.4 (2004/02/11) ------------------------------- * C library - In aitx2s(), apply the boundary condition 0.5 <= Z^2 <= 1 given after Eq. (109) in WCS Paper II to detect outlying pixels. - Fixed several special-case bugs in celset(): 1) For theta_0 = 90, in substituting the default value for phi_p (LONPOLE), a) for the special case when delta_0 = 90, celset() provided the wrong value (180 instead of 0), b) celset() neglected to add phi_0 (normally 0). 2) For theta_0 != 90, a) for the special case when delta_0 = -90, celset() incorrectly computed delta_p (as theta_0 instead of -theta_0), b) for the special case when delta_p = +90 (or -90), celset() neglected to subtract (or add) phi_0 (normally 0). 3) For |delta_0| = 90, celset() incorrectly allowed the particular, invalid, value of phi_p (LONPOLE) that put the other pole at the fiducial point. 4) For theta_0 = 0, delta_0 = 0 LATPOLE determines delta_p completely. For LATPOLE > 90 celset() now sets delta_p to 90, and for LATPOLE < -90 it sets it to -90. - Additional refinements in celset(): 1) cel->ref[2] is normalized in the range [-180,180]. 2) Account for rounding error in the computation of delta_p. - sphx2s() and sphs2x() incorrectly handled the "change in the origin of longitude" special case that arises when delta_p = -90, in the even more restrictive case where |theta| = 90 also; it applied Eq. (3) instead of Eq. (4) of Paper II. - Added a new test program, tcel2.c, to exercise celset() more thoroughly. Renamed the original tcel.c to tcel1.c and modified the Makefile to suit. * Fortran wrappers - (No changes.) * PGSBOX - (No substantive changes.) WCSLIB version 3.3 (2003/10/21) ------------------------------- * C library - In celset(), the default value for phi_p (LONPOLE) is phi_p = phi_0 + ((delta_0 < theta_0) ? 180.0 : 0.0) Previously phi_0 (which is normally zero) was not added (reported by David Berry, STARLINK). - wcsprt() and linprt() now check that the structs have been initialized. - In wcsini(), when the wcsprm flag is -1 also set the linprm flag to -1 to force initialization of the memory managed by linset(). - wcsset() now explicitly initializes the celprm and spcprm structs via celini() and spcini(). - Fixed syntax errors in the macro definitions of linrev_errmsg and linfwd_errmsg. - In Makefile, added the -ansi option to gcc to force it to behave like a strict ANSI C compiler, specifically in setting the __STDC__ preprocessor macro. * Fortran wrappers - (No changes.) * PGSBOX - PGSBOX now recognizes status returns -1, -2, and -3 from NLFUNC for opcodes +2 and +1 which cause it to accept the returned (x,y) coordinates but not consider them as one end of a crossing segment for labelling world coordinate 1, 2, or both. - PGSBOX now takes care not to lose vertical tick marks (and hence labels) at the left or right edge of the frame. Likewise for horizontal tick marks at the top or bottom edge of the frame. - Tightened up the test in PGSBOX for cycles in angle to catch the case where the coordinate value spans a full 360 degrees. - PGSBOX will no longer accept frame crossings that are too oblique; floating point rounding errors may cause grid lines that should otherwise track along the frame to weave down it from side-to-side resulting in spurious crossing points. - Fixed a bug in pgwcsl_() for processing simple linear coordinates. - pgwcsl_() now returns error -2 if the latitude is outside -90 to +90 for opcodes +2 and +1. - Amended the translation of status return codes from WCSLIB in pgwcsl_(). - Provided a header file for pgwcsl_() (mainly for C++ usage). - Added extra test plots to PGTEST and cpgtest. - Added extra functionality to the Makefile. WCSLIB version 3.2 (2003/09/09) ------------------------------- * C library - Added the facility of setting the flag member of a wcsprm struct to -1 before calling wcsini() for the first time in order to initialize memory management. Likewise for linprm and linini(). - Renamed wcscpy() to wcscopy() to avoid a conflict with the Posix "wide character string" function of the same name (wchar.h). In particular, this is used by the GNU C++ string class. - The higher level functions (wcs, cel, spc) no longer return prematurely if some of the input coordinate values are invalid. - All functions now test whether a null pointer for the particular struct (wcsprm, celprm, etc.) has been passed to them. - Function return codes have been rationalized into a consistent set within each of the wcs, cel, lin, prj, spc, and spx suites of functions. Error messages to match these error codes are now encoded in a single character array, e.g. wcs_errmsg and prj_errmsg, instead of a separate array for each function. Macro definitions for the older character arrays (e.g. wcsini_errmsg) have been provided for backward compatibility. - Declared prj_stat as extern in prj.h. * Fortran wrappers - (No changes.) * PGSBOX - Added an ENTRY point, PGLBOX, that provides a simplified interface to PGSBOX for linear axes without having to specify an NLFUNC or the associated parameters. WCSLIB version 3.1 (2003/04/29) ------------------------------- * C library - Added "global" and "divergent" prjprm struct informational members to record whether the projection is capable of mapping the whole sphere, and whether it is divergent in latitude. - Function cylfix() provided to fix WCS FITS header cards for malformed cylindrical projections (c.f. Paper II, Sect. 7.3.4). - Added support for CUNITi cards to wcsprm (but not currently implemented). - Added macro implementations of the trigd functions to wcstrig.h, enabled if WCSTRIG_MACRO is defined. - Improved printing of the WCSLIB structs. - Added macro definitions for the lengths of the WCSLIB structs measured in sizeof(int) units (mainly for the FORTRAN wrappers). * Fortran wrappers - FORTRAN is now supported via a set of wrappers on the C library. Refer to the README file. * PGSBOX WCSLIB version 3.0 beta release (2003/04/01) -------------------------------------------- * C library - Fully vectorized function interfaces (C preprocessor macros are available to implement the scalar interfaces of the proj.c, sph.c, and lin.c routines from WCSLIB 2.x). - Implementation of Paper II, Sect. 2.5: User-specified (phi0, theta0). - Implementation of Paper III (excluding "-TAB"). - Memory management is now implemented in the upper-level (wcs.c) routines. - New extensible design should accomodate Paper IV (and any other) without further change to the function interfaces. * PGSBOX - Added a C wrapper function, cpgsbox(), and C test/demo program, cpgtest, that duplicates PGTEST and serves as a C coding template. - Added calendar date axes. - Sped up the max/min search - if only tickmarks are required there is no need to search the interior of the image. - Return margin widths in CACHE(,NC). - Fixed a buglet that caused ticks at the frame edges to be skipped. - Return error 3 if CACHE overflows. - Adapted PGWCSL for WCSLIB 3.x - it is now a C function (for interfacing to WCSLIB) with a FORTRAN-like interface (for PGSBOX). WCSLIB version 2.9 (2002/04/03) ------------------------------- * C library - Fixed a bug with alias translation in wcsset(). - Added a conditional compilation directive to lin.c for Apple's MacOSX. * Fortran library - Fixed CUBEFACE handling in WCSSET. WCSLIB version 2.8 (2001/11/16) ------------------------------- * C library - Added support for the SZP projection with szpset(), szpfwd() and szprev(), and generalized AZP with support for the tilt parameter, gamma. - Added phi0 to the prjprm struct, this is set by the projection initialization routines along with theta0. - Fixed a problem in wcsmix() caused by numerical imprecision that could cause it not to recognize when convergence was reached; break out of the loop early if a discontinuity is detected. - Clarified the usage of vspan in the prologue to wcsmix(). - Fixed comments relating to LATPOLE in the prologue to cel.c and tcel.c, and replaced references to LONGPOLE with LONPOLE. - Augmented the error reports in twcs2. - Modified projex() in tproj1 and prjplt() in tproj2 to make use of the information stored in the prjprm struct. * Fortran library - Added support for the SZP projection with SZPSET, SZPFWD and SZPREV, and generalized AZP with support for the tilt parameter, gamma. - Changed the call sequence to PRJSET to return PHI0 along with THETA0. - Fixed a problem in WCSMIX caused by numerical imprecision that could cause it not to recognize when convergence was reached; break out of the loop early if a discontinuity is detected. - Clarified the usage of VSPAN in the prologue to WCSMIX. - Fixed comments relating to LATPOLE in the prologue to CEL and TCEL, and replaced references to LONGPOLE with LONPOLE. - Augmented the error reports in TWCS2. - Modified PROJEX in TPROJ1 and PRJPLT in TPROJ2 to use the generic driver routines PRJSET, PRJFWD and PRJREV. PRJPLT also now uses the projection type encoded in PRJ(11). WCSLIB version 2.7 (2001/02/19) ------------------------------- * C library - Added generic driver routines prjset(), prjfwd() and prjrev(). These invoke specific projection routines via the pointer-to- function elements, prjfwd and prjrev, transferred to the prjprm struct from celprm. - Added code (3-letter projection code) and theta0 (reference latitude) elements to prjprm. - The projection code for the Sanson-Flamsteed projection is now SFL. The upper-level routines, wcsset(), wcsfwd(), and wcsrev(), recognize GLS as an alias for this. - wcsset() now recognizes 'xyLN/xyLT' axis pairs. - Two bugs in the translation from NCP to SIN in wcsfwd() and wcsrev() were fixed: (1) the projection parameter was computed incorrectly and (2) they did not honour prj->flag set to -1 to disable strict bounds checking. - A bug in wcsmix() was fixed - it was relying on the wcsprm struct to have been initialized beforehand. - The test programs now use the cpgplot interface to PGPLOT, the old tpgc.c and tpgf.f wrappers have been removed. * Fortran library - Added generic driver routines PRJSET, PRJFWD and PRJREV. These are keyed to specific projection routines via the value of PRJ(11) which now differs for each projection. - The projection code for the Sanson-Flamsteed projection is now SFL. The upper-level routines, WCSSET, WCSFWD, and WCSREV, recognize GLS as an alias for this. - WCSSET now recognizes 'xyLN/xyLT' axis pairs. - A bug in the translation from NCP to SIN in WCSFWD and WCSREV was fixed; they did not honour PRJ(11) set to -1 to disable strict bounds checking. - A bug in WCSMIX was fixed - it was relying on the WCS array to have been initialized beforehand. WCSLIB version 2.6 (2000/05/10) ------------------------------- * C library - Check for invalid (x,y) in zearev(). - In wcsmath.h, guard against prior definition of PI and other preprocessor variables. * Fortran library - Check for invalid (X,Y) in ZEAREV. - Declare COSD and SIND in WCSFWD and WCSREV, reported by Clive Page (cgp@star.le.ac.uk). WCSLIB version 2.5 (1999/12/14) ------------------------------- * C library - Added copyright notice to header files and prefixed include guard names with "WCSLIB_". - Fixed cube face handling in wcsfwd() and wcsrev() (reported by Doug Mink, CfA). Allow more general face layout in the inverse quadcube projections. - Fixed the problem in wcsmix() where it failed to find a valid solution when the solution point lay at a native pole of a projection in which the pole is represented as a finite interval. However, wcsmix() will only ever return one solution even when two or more valid solutions may exist. - wcsmix() now accepts viter in the range 5 - 10, the specified value will be pushed up or down into this range if necessary. - The projection routines for AZP, TAN, SIN, ZPN, and COP now return error 2 if (phi,theta) correspond to the overlapped (far) side of the projection. This strict bounds checking can be switched off by setting prj->flag to -1 (rather than 0) when the projections are initialized. - The upper level routines, wcsset(), wcsfwd(), wcsrev(), and wcsmix(), now recognize the NCP projection and convert it to the equivalent SIN projection. The lower level routines do not recognize NCP. - Extracted definitions of mathematical constants (PI etc.) from proj.h into wcsmath.h in order to avoid conflicts with their definition in math.h in some systems (such as Linux). - Describe the two alternate representations of the quadcube projections (i.e. faces laid out or stacked) in the prologue of wcs.c. * Fortran library - Fixed cube face handling in WCSFWD and WCSREV, reported by Doug Mink (dmink@cfa.harvard.edu). Allow more general face layout in the inverse quadcube projections. - Fixed the problem in WCSMIX where it failed to find a valid solution when the solution point lay at a native pole of a projection in which the pole is represented as a finite interval. However, WCSMIX will only ever return one solution even when two or more valid solutions may exist. - WCSMIX now accepts VITER in the range 5 - 10, the specified value will be pushed up or down into this range if necessary. - The projection routines for AZP, TAN, SIN, ZPN, and COP now return error 2 if (phi,theta) correspond to the overlapped (far) side of the projection. This strict bounds checking can be switched off by setting PRJ(11) to -1 (rather than 0) when the projections are initialized. - The upper level routines, WCSSET, WCSFWD, WCSREV, and WCSMIX, now recognize the NCP projection and convert it to the equivalent SIN projection. The lower level routines do not recognize NCP. - Describe the two alternate representations of the quadcube projections (i.e. faces laid out or stacked) in the prologue of wcs.f. WCSLIB version 2.4 (1996/09/23) ------------------------------- * C library - In sinrev(), cscrev(), qscrev(), and tscrev(), return error 2 if (x,y) do not lie within the perimeter of the projection. In sinrev(), stop the computation of phi for the "synthesis" projection being applied to the pure "orthographic" case (reported by David Berry, STARLINK). - (Internal change) Renamed variables l <-> m in the quadcube projections to accord with standard usage (and revised WCS draft paper). * Fortran library - In SINREV, CSCREV, QSCREV, and TSCREV, return error 2 if (X,Y) do not lie within the perimeter of the projection. In SINREV, stop the computation of PHI for the "synthesis" projection being applied to the pure "orthographic" case. Reported by David Berry (dsb@ast.man.ac.uk). - (Internal change) Renamed variables L <-> M in the quadcube projections to accord with standard usage (and revised WCS draft paper). - (Internal change) Stopped PRJ(11) doing double service in any projection. It is now set and tested for a specific magic value rather than simply being non-zero. WCSLIB version 2.3 (1996/06/24) ------------------------------- * C library - Fixed two bugs in zpnset(). The first led to an incorrect determination of the degree of the polynomial and would mainly have affected the efficiency of zpnrev(). The second affected the determination of the boundary of the projection but would only have been significant for projections with a point of inflection between 9 and 10 degrees of the pole. Reported by David Berry, STARLINK. - Replaced usage of alloca() in lin.c with malloc() and free() for portability as suggested by Klaus Banse, ESO (kbanse@eso.org). - Allow for C implementations that provide their own versions of cosd(), sind(), tand(), acosd(), asind(), atand(), and atan2d(). From Klaus Banse, ESO (kbanse@eso.org). - Implemented the CUBEFACE axis for quadcube projections. - Made all function prototypes const-correct. - Adapted the header files to C++ usage. - Added a new test program, twcs1, to verify closure of wcsfwd() and wcsrev(). The old twcs test program is now called twcs2. - Added external arrays of error messages indexed by function return value. For example, extern const char *wcsmix_errmsg[] for wcsmix(). Messages for the many proj.c functions are in prjfwd_errmsg[], etc. * Fortran library - Implemented the CUBEFACE axis for quadcube projections. - Added a new test program, TWCS1, to verify closure of WCSFWD and WCSREV. The old TWCS test program is now called TWCS2. WCSLIB version 2.2 (1996/01/18) ------------------------------- * C library - Amended the projection equations for the conics (COP, COD, COE, COO) and Bonne's projection (BON) to correctly handle southern hemisphere projections with PROJP1 < 0 (reported by Lindsay Davis, NOAO). Revised tproj1 and tproj2 to test such cases. * Fortran library - Amended the projection equations for the conics (COP, COD, COE, COO) and Bonne's projection (BON) to correctly handle southern hemisphere projections with PROJP1 < 0 (reported by Lindsay Davis, NOAO). Revised TPROJ1 and TPROJ2 to test such cases. - Increased the dimension of the WCS array from WCS(0:2) to WCS(0:3) to allow for future handling of the CUBEFACE keyword - WCS(3) will store an index to the CUBEFACE axis. This affects the call sequences of WCSSET, WCSFWD, WCSREV, and WCSMIX. WCSLIB version 2.1 (1995/11/17) ------------------------------- * C library The main change of interest to programmers is that of changed argument lists for wcsfwd() and wcsrev() as described below. - The WCS linear transformations are now implemented in WCSLIB, complete with matrix inverter. The new files are lin.c, lin.h, and test program tlin.c. - Given either the celestial longitude or latitude plus an element of the pixel coordinate a new routine, wcsmix(), solves for the remaining elements by iterating on the unknown celestial coordinate element using wcsfwd(). - The high level driver routines wcsfwd(), wcsrev(), and wcsmix() now apply the full WCS algorithm chain (except for pixel regularization table), including parsing the CTYPEn header cards and computing non- celestial elements of the world coordinate. This required a change to their argument lists which now more closely reflect the sequence of algorithms applied. A new routine, wcsset(), parses the CTYPEn. - The high level driver routines of WCSLIB 1.0 are available as intermediate level drivers celset(), celfwd(), and celrev(), but note that their argument lists have been extended to return native coordinates. The related struct is now called celprm instead of wcsprm. - The reference point for conic projections is now at the midpoint of the standard parallels. The FITS header cards PROJP1 and PROJP2 now give the half-sum (midpoint) and half-difference of the latitudes of the standard parallels; previously they gave the latitudes of the standard parallels themselves. The change is reflected in this release of WCSLIB. - A bug in celset() (formerly wcsset()) that misapplied WCS draft equations 7 has been fixed (thanks to Rick Ebert IPAC/JPL and Lindsey Davis, NOAO for reporting this). This affected the computation of Euler angles for the celestial coordinate transformation for those projections that have their reference point away from the native pole. In investigating this a deficiency with the formalism was discovered that led to the introduction of a LATPOLE FITS header card which may be used to disambiguate where CRVAL1, CRVAL2, and LONGPOLE do not uniquely determine the latitude of the native pole. The celprm struct (formerly wcsprm) has been extended to accomodate LATPOLE. - Default values of LONGPOLE and LATPOLE are now supported and their use is recommended where appropriate. - Numerical precision was being lost near the native poles in the SIN, AIR, and QSC projections and this has been recovered (reported by Lindsey Davis, NOAO). Floating underflows in CSC are now avoided. - Numerical precision was also lost in certain circumstances in the spherical coordinate transformation routines and this has been fixed. - The test programs have been enhanced in various ways and the library has been validated on an SGI machine using both 32-bit and 64-bit compilers. * Fortran library The main change of interest to programmers is that of changed call sequences for WCSFWD and WCSREV as described below. - The WCS linear transformations are now implemented in WCSLIB, complete with matrix inverter. The new files are lin.f and test program tlin.f. - Given either the celestial longitude or latitude plus an element of the pixel coordinate a new routine, WCSMIX, solves for the remaining elements by iterating on the unknown celestial coordinate element using WCSFWD. - The high level driver routines WCSFWD, WCSREV, and WCSMIX now apply the full WCS algorithm chain (except for pixel regularization table), including parsing the CTYPEn header cards and computing non- celestial elements of the world coordinate. This required a change to their call sequences which now more closely reflect the sequence of algorithms applied. A new routine, WCSSET, parses the CTYPEn. - The high level driver routines of WCSLIB 1.0 are available as intermediate level drivers CELSET, CELFWD, and CELREV, but note that their call sequences have been extended to return native coordinates. The related parameter array is now called CEL instead of WCS. - The reference point for conic projections is now at the midpoint of the standard parallels. The FITS header cards PROJP1 and PROJP2 now give the half-sum (midpoint) and half-difference of the latitudes of the standard parallels; previously they gave the latitudes of the standard parallels themselves. The change is reflected in this release of WCSLIB. - A bug in CELSET (formerly WCSSET) that misapplied WCS draft equations 7 has been fixed (thanks to Rick Ebert IPAC/JPL and Lindsey Davis, NOAO for reporting this). This affected the computation of Euler angles for the celestial coordinate transformation for those projections that have their reference point away from the native pole. In investigating this a deficiency with the formalism was discovered that led to the introduction of a LATPOLE FITS header card which may be used to disambiguate where CRVAL1, CRVAL2, and LONGPOLE do not uniquely determine the latitude of the native pole. The CEL parameter array (formerly WCS) has been extended to accomodate LATPOLE as CEL(4), and the flag variable is now CEL(5) (formerly WCS(4)). - Default values of LONGPOLE and LATPOLE are now supported and their use is recommended where appropriate. - Numerical precision was being lost near the native poles in the SIN, AIR, and QSC projections and this has been recovered (reported by Lindsey Davis, NOAO). Floating underflows in CSC are now avoided. - Numerical precision was also lost in certain circumstances in the spherical coordinate transformation routines and this has been fixed. - The test programs have been enhanced in various ways and the library has been validated on an SGI machine using both 32-bit and 64-bit compilers. WCSLIB version 1.0 (1995/01/31) ------------------------------- * C library Initial release. * Fortran library Initial release. ------------------------------------------------------------------------ $Id: CHANGES,v 6.2 2018/10/20 10:03:14 mcalabre Exp $