[AstroPy] Healpy

[Erik Bray]

I strongly agree with Wolfgang here--licensing issues aside I don't think 
healpy, or some equivalent thereof, really belongs in the Astropy core package 
in the first place.  But having a Pythonic interface to healpix that works 
seamlessly with other Astropy-ish code is good and the reproject package seems 
to be the place for that.  Couldn't have said it better.

Erik

On 10/05/2015 05:26 AM, Wolfgang Kerzendorf wrote:
> Hi Emil,
>
> I personally believe that astropy shouldn't go out and incorporate all the
> smaller packates into astropy core. Everytime something is incorporated, the
> astropy core team would need to support and maintenance of the package (and
> astropy core is already stretched thin). So I think it's better for everyone if
> they stay independent (it's trivial to type pip install healpy and works well).
> BUT, what I totally agree with you is that the astro packages should easily work
> together. I would be very keen to hear what functionality is still clunky? How
> would you like astropy and healpy to work better together?
>
> Cheers,
>     Wolfgang
>
> --
> Dr. Wolfgang E Kerzendorf
> ESO Fellow
> European Southern Observatory
> Karl-Schwarzschild Str. 2, 85748
> Garching bei Muenchen, Germany
>
> On Mon, Oct 5, 2015 at 9:00 AM Emil Lenc <elenc at me.com <mailto:elenc at me.com>> wrote:
>
>     Thanks everyone for the useful input.
>
>     Tom, thanks also for highlighting the reprojection functionality as I wasn’t
>     aware of it - that’s certainly something that’ll be useful to keep in mind.
>     BTW, one of the additional bits of functionality that healpy provides is
>     functionality associated with spherical harmonics. I’m fairly new in terms
>     of working in this domain and I could be wrong but I assume this is not
>     available elsewhere?
>
>     It would be a shame if licensing was the primary issue that prevented healpy
>     from being incorporated - hopefully this can change in future.
>
>     Cheers,
>
>     Emil.
>
>      > On 3 Oct 2015, at 17:46, Thomas Robitaille <thomas.robitaille at gmail.com
>     <mailto:thomas.robitaille at gmail.com>> wrote:
>      >
>      > Hi Emil,
>      >
>      > The 'reproject' Astropy-affiliated package provides a way to easily
>      > reproject images using Healpy in addition to astropy.wcs:
>      >
>      > http://reproject.readthedocs.org/en/stable/
>      >
>      > The functionality with Healpy is optional, so the package is normally
>      > BSD-licensed, but if you do install Healpy, then as indicated here:
>      >
>      > http://reproject.readthedocs.org/en/stable/healpix.html
>      >
>      > you have to abide by the GPL license instead.
>      >
>      > Cheers,
>      > Tom
>      >
>      > Emil Lenc wrote:
>      >> Hi All,
>      >>
>      >> I was wondering if there were any plans to incorporate healpy (the
>     python interface to the HEALPIX library) into astropy? I often work between
>     HEALPIX and FITS format images and it would be really convenient to have
>     these two common formats available within the same package.
>      >>
>      >> Cheers,
>      >>
>      >> Emil.
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