[fitsbits] [Fwd: cfitisio/wcslib inheritance]

Subject: cfitisio/wcslib inheritance
Date: Thu, 25 May 2006 10:01:11 +0100
From: Peter Bunclark
Organization: University of Cambridge, England
Newsgroups: sci.astro.fits

Is there a simple way to inherit the primary header when using
fits_hdr2str and wcspih ? The particular case being, EQUINOX and
RADESYS are in the primary (which has NAXIS = 0) and the rest
of the WCS in the extesions of a MEF.

If I concatenate the strings from hdr2str for the primary and
each extension, will wcspih skim past the initial dataless
header?

Regardless of whether wcspih (in wcslib) will ignore the NAXIS = 0 keyword
from the primary array, a more robust solution would be to use the 'exclist'
parameter in the first call to fits_hdr2str (in CFITSIO) to exclude the
NAXIS primary array keyword (and SIMPLE and BITPIX as well) from the output
string. Then concatenate the keyword string from the primary array onto the
end of the keyword string from each extension.

Bill Pence
--
__________________________________________________ __________________
Dr. William Pence
NASA/GSFC Code 662 HEASARC +1-301-286-4599 (voice)
Greenbelt MD 20771 +1-301-286-1684 (fax)