NAME

       wcsgrid - Extract FITS WCS keywords and plot graticule

SYNOPSIS

       wcsgrid [-a<alt>] [-d<pgdev>] [-h<hdu>] [<fitsfile>]

DESCRIPTION

       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.

       The FITS file may be specified according to the syntax understood by cfitsio, for  example
       "file.fits.gz+1" refers to the first extension of a gzip'd FITS file.  Use "-" or omit the
       file name for input from stdin.

OPTIONS

       -a<alt>
              Plot a graticule only for the alternate representation specified (ignored if  there
              is only one).

       -d<pgdev>
              PGPLOT device type (default XWINDOW, use "?" for list).

       -h<hdu>
              Move  to  HDU  number  (1-relative)  which  is  expected to contain an image array.
              (Useful for input from stdin.)