[fitsbits] CRPIX clarification

[Mark Calabretta]

On Thu 2008/06/12 14:13:44 -0400, William Pence wrote
in a message to: FITSBITS <fitsbits at nrao.edu>

>1.  Change the first sentence in section 8.1 from
>
>   Rather than store world coordinates separately for each datum (e.g. as
>   is done for random groups data), the regular lattice structure of a
>   FITS image offers the possibility of defining rules for computing
>   world coordinates at each point.
>
>to
>
>   Rather than store world coordinates separately for each datum, one
>   may define rules for computing world coordinates at each point.

This change is not acceptable to me.

The underlying basis of the world coordinate formalism is that the
data has a regular structure, unlike random groups for example.
Metrics don't come into it, at least not at this level.

Regards, Mark