Re: VO standard for JPEG with WCS

Since it can be specified in STC XML, one could include an STC ObsDataLocation element. That way we use a VO standard.

• Arnold

Pierre Fernique wrote:
>
>
> Hi all,
>
> Some projects are using JPEG images with WCS keywords or FITS header
> memorized into a JPEG comment segment (DSS colour images from MAST, SDSS
> JPEG images, Aladin JPEG images,...).
>
> Unfortunately these methods are not compatible, not documented and seems
> to evolve.
>
> Could we have a kind of VO standard related to this point ?
>
> One suggestion would be to put the FITS header - or a portion of the
> FITS header - into a JPEG comment segment (starting with FF FE) directly
> in ASCII but with the possibility for wrapping each line by a CR instead
> of keeping the 80 character FITS justification. By this way, a simple
> "strings" command (or equivalent) allows to display immediately the
> metadata. Another advantage, and not the least, is to have the
> possibility for keeping all the FITS metadata.
>
> Good idea ? Bad idea ? Other suggestions ?
>
> Regards
> Pierre Fernique
>

Arnold H. Rots                                Chandra X-ray Science Center
Smithsonian Astrophysical Observatory                tel:  +1 617 496 7701
60 Garden Street, MS 67                              fax:  +1 617 495 7356
Cambridge, MA 02138                             arots-at-head.cfa.harvard.edu
USA                                     http://hea-www.harvard.edu/~arots/
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