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    1 WCSsubs Subroutines
    2 
    3 These subroutines, developed as part of the WCSTools software package,
    4 constitute a self-contained package for accessing the world coordinate
    5 systems of FITS or IRAF(.imh) images, with image header I/O contained
    6 in fitsfile.c and imhfile.c, and WCS initialization and use through the
    7 subroutines in wcs.c.  WCS information for an image is kept in a single
    8 data structure defined in wcs.h.  Pixel to WCS translations are done by
    9 calls to pix2wcst() or pix2wcs().  WCS to pixel translations are done
   10 by calls to wcs2pix() or wcsc2pix().  The contents of the files are
   11 briefly described in Files.  Dependencies between these files are given
   12 in Makefile.  Documentation, to some extent, is online at
   13 
   14 http://tdc-www.harvard.edu/software/wcstools/libwcs.wcs.html
   15 
   16 Documentation for the entire open-source WCSTools package is online at
   17 
   18 http://tdc-www.harvard.edu/software/wcstools/
   19 
   20 Projection code in wcspos.c is by Bill Cotton of NRAO and is
   21 protected by the Gnu Lesser General Public License, which is stated
   22 in the file COPYING.  Projection code in wcslib.c,
   23 cel.c, lin.c, proj.c, wcstrig.c, and sph.c is by Mark Calabretta
   24 of CSIRO and is also protected by the Gnu Lesser General Public
   25 License.  Code in slasubs.c is by Pat Wallace of the Starlink
   26 project at Cambridge University.  Doug Mink is responsible for
   27 the rest of the code, unless otherwise noted in the source file.
   28 Unless otherwise noted, this code is Copyright 2003 by the
   29 Smithsonian Astrophysical Observatory and protected by the Gnu
   30 Lesser General Public License.
   31 
   32 -Jessica Mink (jmink@cfa.harvard.edu)
   33  Telescope Data Center
   34  Harvard-Smithsonian Center for Astrophysics
   35  Cambridge, Massachusetts
   36  http://tdc-www.harvard.edu/mink