[fitswcs] WCS with NAXIS=0

[William Pence]

Eric Greisen wrote:
> 
> William Pence writes:
>  > Is the use of WCS keywords (like CRPIX1 and CRVAL1) now allowed in image
>  > HDUs which have NAXIS = 0?  This question has to do with whether our FITS
>  > verification program (fverify) should issue any warning or error message if
>  > this occurs.
>  >
> 
> That is what WCSAXES is all about.  See
>       http://www.aoc.nrao.edu/~egreisen
> for links to versions of Paper I and info about its volume and page
> numbers.

Should this be considered an error if there is no WCSAXES keyword?

Bill