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[fitsbits] Start of the 'INHERIT' Public Comment Period
On Fri 2007-04-06T08:03:37 -0700, Rob Seaman hath writ:
William Pence wrote: Maybe I'm missing your point, but I don't see how that paper can be interpreted as an endorsement of the inherit convention. It can't. The fact that the paper attempted to force a particular outcome There are factors other than the approved FITS papers which have forced particular outcomes. This was also in the context of PHDUs which with empty data arrays. The data reduction package developed at Lick would not accept FITS files unless the PHDU contained these keywords: NAXIS = 2 NAXIS1 = 0 NAXIS2 = 0 So that's what we put in the empty PHDU of our mosaic files. But as we got close to the point of deploying the instrument producing these files we found that we could not continue that practice, for the data reduction package developed at NOAO would not accept such FITS files. What it wanted was NAXIS = 0 I note with gratitude that Pence's FITSIO toolkit allowed either scenario without forcing the issue. The larger internet world of interoperable standards is attacking another such issue right now with calendaring programs. http://www.ietf.org/html.charters/calsify-charter.html One might think that scheduling appointments using civil time and the Gregorian calendar had a well tested, obvious solution, but no. In that arena the initial standard in RFC 2445 was not firm enough. Existing implementations ignore the letter of the standard and are not fully interoperable. They are struggling with a new version in hopes of removing ambiguity while maintaining compatibility, but this has been opined: I believe we should make it clear to implementors that they ignore VERSION at their peril. To some extent FITS, at least the voice of the community if not the letter of the standard, probably has to do the same. -- Steve Allen WGS-84 (GPS) UCO/Lick Observatory Natural Sciences II, Room 165 Lat +36.99845 University of California Voice: +1 831 459 3046 Lng -122.06025 Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m |
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