[AstroPy] Astropy WCS question

[Michael Droettboom]

Brian,

Would you mind looking at the following pull request to confirm it 
addresses the lack of documentation for you?

https://github.com/astropy/astropy/issues/2777

Mike

On 07/21/2014 04:17 PM, Brian York wrote:
> Thank you. I hadn't realized that the function existed. I will note that
> the documentation at
>
> 	<http://docs.astropy.org/en/stable/wcs/index.html>
>
> mentions all_pix2world, wcs_world2pix, and wcs_pix2world but does not
> mention that all_world2pix exists.
>
> 	-Brian
>
> On 2014/07/21 16:05 , "Perry Greenfield" <stsci.perry at gmail.com> wrote:
>
>> Actually, I meant all_world2pixŠ
>>
>> On Jul 21, 2014, at 4:03 PM, Perry Greenfield wrote:
>>
>>> I think the answer depends on distortion model you are using, but
>>> all_pix2world is probably what you want if your distortion model is one
>>> that they mention.
>>>
>>> Perry
>>>
>>>
>>> On Jul 21, 2014, at 3:35 PM, Brian York wrote:
>>>
>>>> Greetings,
>>>>
>>>> My apologies if this has already been asked, but I did not have
>>>> terribly
>>>> good luck in searching the list archives. I'm currently working on some
>>>> image simulation, and think that astropy.wcs might be useful to me, but
>>>> I'm not sufficiently knowledgeable about WCS systems (or, for that
>>>> matter,
>>>> about astropy) to be sure.
>>>>
>>>> I have a list of sources, each with an RA, DEC, and intensity (in
>>>> counts/s), and I have a FITS header representing my output image, with
>>>> WCS
>>>> and SIP coefficients. I know that wcs_world2pix would give me pixel
>>>> co-ordinates in the absence of distortion, but I'm wondering if there's
>>>> some combination of calls that can convert from (RA,DEC) to (X,Y) with
>>>> the
>>>> distortion information that I have available?
>>>>
>>>> Thanks,
>>>> 	-Brian York
>>>>
>>>>
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-- 
Michael Droettboom
Science Software Branch
Space Telescope Science Institute

http://www.droettboom.com