[fitsbits] reopening of Public Comment Period on the compression conventions

[van Nieuwenhoven, Richard]

Just a small note to NULL_PIXEL_MASK, it not yet used (shouldn't be
because there are no implementations available as Bill has not
implemented it yet). I think it is a waste of space using a byte for
every pixel to indicate if it is null or not, even if it is compressed
afterwards. Could it not be seen an array of bits, still compressed
because most values would be the set. The size of the array would
indicate that a bit mask was used, so no additional information is
necessary.

-Ritchie



Am 2016-01-11 um 15:36 schrieb Lucio Chiappetti:
> ANNOUNCEMENT:  START OF FORMAL PUBLIC COMMENT PERIOD
> 
> This is to announce the official reopening of a formal Public Comment
> Period on the incorporation of the Tiled Image Compression and Tiled
> Table Compression conventions in the FITS Standard.
> 
> A previous PCP was held in June-July (started on 16 Jun 2015).
> 
> We are now re-opening the Public Comment Period to collect comments on
> the modified text, ONE CONVENTION AT A TIME. When the PCP is over,
> IAUFWG will vote on one convention in turn, while the next one will be
> offered for public comments, and so on.
> 
> The second convention if the list, to be discussed NOW defines the
> Tiled Image Compression and Tiled Table Compression conventions.
> 
> The proposed text consists
> 
> - in the ADDITION of an entire new chapter (10)  to the FITS Standard
>   Document which describes the two conventions in a common prescriptive
>   framework.
> - It also includes the ADDITION of a new non-prescriptive Appendix I,
> 
> Only minor re-wording were applied w.r.t. the earlier version.
> Considering that, despite its complexity, the proposal did not receive
> any substantial objections, I am reopening the PCP for TWO WEEKS (in
> order to speed up the cumulative prcoess dealing with all conventions),
> but this can be extended if requested and motivated.
> 
> The updated draft text is available at
> http://sax.iasf-milano.inaf.it/~lucio/FITS/Conventions/compression-rev.pdf
> 
> - the relevant bibliographic references, and appendices C and H.3 will be
>   updated accordingly at the end of the convention incorporation procedure
>   (this text is NOT shown but a cumulative draft is available at
>   http://sax.iasf-milano.inaf.it/~lucio/FITS/Conventions/commonapps-rev.pdf
> 
> Please review the text carefully and post any comments, criticisms, or
> suggestions on the FITSBITS mailing list.
> 
> Supporting material for the PREVIOUS public comment period announcement
> can be retrieved from the FITSBITS archives
> https://listmgr.nrao.edu/pipermail/fitsbits/2015-June/002615.html
> 
> ==================================================================
> 
> The reopened Public Comment Period starts today 11 January 2015 and will
> last until 24 January 2016, unless extensions are requested and motivated.
> 


-- 
BSc Richard van Nieuwenhoven
Software Architekt

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