[AstroPy] Bug in wcs_world2pix?

[Michael Droettboom]

The range of ra and dec is (-180, 180) and (-90, 90) respectively.  
(211, -26) is equivalent to (31, 26).

Mike

On 09/18/2014 05:04 PM, Maik Riechert wrote:
> Hi,
>
> I'm having some great trouble currently and am a bit confused too:
>
> wcs = WCS(header)
> x,y = wcs.wcs_world2pix(211, -26, 0)
> print x,y # 836.316942718 658.26364248
> ra,dec = wcs.wcs_pix2world(x, y, 0)
> print ra, dec # 31.0 26.0
>
> It seems like world2pix gives me bogus results. I was expecting values
> way outside my image area (image size is 4256x2832). Am I doing
> something obvious wrong?
>
> The WCS headers can be seen at http://pastebin.com/JrdiL949
>
> Thanks for the help,
> Maik
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-- 
Michael Droettboom
Science Software Branch
Space Telescope Science Institute

http://www.droettboom.com