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Makefile
Dependencies for wcssubs files
cel.c
WCSLIB spherical coordinate transformation drivers
dateutil.c
Subroutines for converting between various date formats and types
distort.c
Subroutines for distortion correction between image pixels and focal plane
coordinates.
dsspos.c
dsspos() uses the WCS structure to compute sky coordinates given
image pixel X and Y for images with Digitized Sky Survey plate solutions
in their headers. dsspix() uses the WCS structure to compute image
pixel X and Y given sky coordinates for DSS images. Algorithms from
StSCI CASB.
fileutil.c
Subroutines for finding size and contents of ASCII files
fitsfile.c
FITS header and image reading and writing subroutines, including FITS
table support.
hget.c
Subroutines to extract values from FITS headers by keyword.
Subroutines for parsing RA and Dec strings are included.
hput.c
Subroutines to implant values into FITS headers by keyword (and to
delete headers).
iget.c
Subroutines to extract values from IRAF multi-keyword header parameters
imio.c
Subroutines to get, put, and move pixels of various data types between images
im memory and a program.
imhfile.c
IRAF header and image reading and writing subroutines. IRAF headers
are converted to FITS headers for use by other programs and can be
derived from FITS headers for writing.
iraf2fits.c
IRAF header to FITS header conversion routine which makes IRAF header
accessible to WCS subroutines. Use this if you only want to read IRAF headers.
It is an older version of iraf2fits() in imhfile.c and uses fewer subroutines
from the rest of the library.
lin.c
WCSLIB linear transformation subroutines
platepos.c
platepos() uses the WCS structure to compute sky coordinates given
image pixel X and Y for images with polynomial plate solutions
in their headers. platepix() uses the WCS structure to compute image
pixel X and Y given sky coordinates for such images. Algorithms are based
on those in dsspos.c, but go straight from pixels to angles without an
intermediate plate coordinate.
proj.c
WCSLIB spherical map projection subroutines
slasubs.c
Coordinate transformation subroutines direct from Starlink's SLA_Lib
sph.c
WCSLIB spherical coordinate transformation subroutines
tnxpos.c
tnxpos() uses the WCS keywords set up for IRAF's TNX projection to compute
sky coordinates given image pixel X and Y. tnxpix() uses the WCS structure
to compute image pixel X and Y given sky coordinates for such images. The
projection is a tangent plane with corrections between the rotation and
scaling and the actual projection.
wcs.c
Subroutines for using FITS or IRAF header spatial world coordinate
system information.
wcsinit.c
Subroutines to initialize WCS structure from a FITS header
wcscon.c
Subroutines for converting between B1950, J2000, and galactic
coordinates, based on Starlink SLA_LIB subroutines.
wcslib.c
WCSLIB high level driver subroutines
wcstrig.c
WCSLIB trig and inverse trig functions using angles in degrees
worldpos.c
worldpos() uses the WCS structure to compute sky coordinates given
image pixel X and Y for images with header information for any of 8
standard world coordinate systems. worldpix() uses the WCS structure
to compute image pixel X and Y given sky coordinates for the same images.
Mostly from NRAO.
fitshead.h
Declarations of FITS header access subroutines
fitsfile.h
Declarations of image access subroutines and FITS table data structure.
wcs.h
Declaration of WCS data structure and useful conversions.
wcslib.h
Declarations for WCSLIB high level driver subroutines
Declarations for WCSLIB spherical coordinate transformation drivers
Declarations for WCSLIB linear transformation subroutines
Declarations for WCSLIB spherical map projection subroutines
Declarations for WCSLIB trig and inverse trig functions
* Notes:
slasubs.c contains unmodified subroutines from Pat Wallace's Starlink
astrometry library and may be omitted if that library is
being linked.
WCSLIB subroutines were written by Mark Calabretta of CSIRO and have
been modified in three ways:
1) His distributed wcs.c has been changed to wcslib.c, and
2) wcstrig.c subroutine names have been changed from <function>d()
to <function>deg() to avoid name conflicts on some operating
systems.
3) ifndef's at start of headers files have been named to reflect
the names of the header files, i.e. wcslib_h_ in wcslib.h.
4) all header files combined into wcslib.h
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