Re: FITS header values

[Jure Skvarc <jure.skvarc@ijs.si>]

Regarding the latest WCS discussion of use of CD1_1, etc keywords instead of
CDELT and CROT I looked at the source code of the CFITSIO library and found out
that this is automatically supported in the following way:  

if the CDELT keywords are present, 
   use them (and CROTA)
else
  if CD keywords are present, 
	use them and convert inteernally to CDELT and CROTA
  else 
        /* neither CD nor CDELT are present  */
        put CDELT=1 (degree)
        put CROTA=0


So, if both keywords (CD and CDELT) are there, the old convention (CDELT) is
used.

			Jure Skvarc