VO standard for JPEG with WCS

[Arnold Rots]

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
> 
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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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