[fitsbits] CRPIX clarification

[Rob Seaman]

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 <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
>>
>>
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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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