[AstroPy] Using oblique SIN projections in astropy

[Thomas Robitaille]

Hi Tim,

Just to make sure I understand, you are trying to reproject an image to the
-SIN projection? What projection is the image originally in?

Cheers,
Tom


On 15 December 2016 at 11:34, Tim Cornwell <realtimcornwell at gmail.com>
wrote:

> Hi,
>
> I’m trying to use oblique projections in astropy for the SIN (Slant
> Orthographic) projection. This is well-defined in the Greisen/Calabretta
> papers and in WCSLIB. I’m confident that casacore can do it but I’d prefer
> not to have to build CASA for this purpose (a reference library of
> calibration and imaging algorithms).
>
> In astropy, I can see two different approaches:
>
> - Use the reproject package
> - Use astropy.modelling.projections package
>
> I’m struggling with the former. The results do not seem correct. Before
> diving deeper (which would require building casacore for some comparisons),
> I’d like to know if trying the second approach is likely to work. What is
> the relationship between the two packages?
>
> Thanks,
> Tim Cornwell
>
> --
> Tim Cornwell
> Sent with Airmail
>
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