[fitsbits] Primary & Alternate WCS Keyword Order
Mark Calabretta
mark at calabretta.id.au
Sun Jul 1 11:47:31 EDT 2012
On Sat 2012/06/30 11:52:55 -0400, Phil Hodge wrote
in a message to: <fitsbits at nrao.edu>
>> WCSAXESa -- [integer; default: NAXIS or largest of WCS indexes i or j
>> for representation 'a']
>> Number of coordinate elements in WCS description 'a'. This keyword,
>> if present,_should_ precede all keywords for WCS description 'a',
>> except NAXIS. Note that the value of WCSAXESa_may_ exceed the number
>> of pixel axes for the HDU, and that the default value of WCSAXESa may
>> differ for differing 'a'.
>
>Did you mean that the value of WCSAXESa may differ for differing 'a', or
>just that the default value may differ?
Both. If the WCSAXESa can differ from NAXIS then there's no reason to
expect them not to differ from each other.
Regards, Mark
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