"WCSLIB is a C library, supplied with a full set of Fortran wrappers, that
implements the "World Coordinate System" (WCS) convention in FITS (Flexible
Image Transport System). It also includes a PGPLOT-based routine, PGSBOX,
for drawing general curvilinear coordinate graticules and a number of
utility programs." - from README file.
Submitted by: Tony Maher <email@example.com>