Perhaps simply excise "(e.g. as is done for random groups data)"? The
less said about random groups, the better :-)

Rob
--

On Jun 16, 2008, at 7:20 AM, Eric Greisen wrote:

Mark Calabretta wrote:
On Thu 2008/06/12 14:13:44 -0400, William Pence wrote
in a message to: FITSBITS

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


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I did not like the former wording since random groups does have a
regular lattice with WCS under the same rules as images along with the
random parameters which need not have rules.

Eric Greisen


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