[AstroPy] Astropy 0.3 and TPV projection

[David Berry]

On 3 December 2013 20:15, Kyle Barbary <kyle at anl.gov> wrote:

> The TPV projection [1] is also being used by the Dark Energy Survey. I
> think support for TPV would have to be implemented in Mark Calabretta's
> wcslib C library, which underlies astropy.wcs. It seems like programs that
> do support TPV generally use the "other" wcs library [2]. Does anyone know
> if support for TPV is planned for wcslib?
> It would be really nice to have.
>
>
Not part of astropy, but pyast includes support for TPV. pyast is a python
wrapper round the AST library, which is the WCS library used by DS9. See:

http://dsberry.github.io/starlink/pyast.html

David




> [1] http://fits.gsfc.nasa.gov/registry/tpvwcs.html
> [2] http://tdc-www.harvard.edu/software/wcstools/libwcs.subs.html
>
>
> On Tue, Nov 26, 2013 at 11:54 AM, Jean-Baptiste Marquette <marquett at iap.fr
> > wrote:
>
>> Hi Astropy gurus,
>>
>> I'm just testing this new and impressive release with images from the SSO
>> SkyMapper telescope, and got trouble with the TPV projection, since these
>> images were calibrated using Emmanuel Bertin's SCAMP package. The message
>> is:
>>
>> WARNING: FITSFixedWarning: 'celfix' made the change 'Unrecognized
>> projection code (TPV in CTYPE1)'. [astropy.wcs.wcs]
>>
>> I previously seamlessly used the astLib package, and both ds9 and
>> Gaia/Starlink image browsers recognize the TPV projection. Integration in
>> Astropy's wcs module would be greatly appreciated as well.
>>
>> Thanks for your help,
>> Cheers,
>> JB
>>
>>
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>>
>
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