[QGIS-Developer] Sunrise, Sunset, Lunar Calculations

[C Hamilton]

I will look into C libraries. Does anyone here have a suggestion?

On Mon, Jul 1, 2019 at 7:20 PM Nyall Dawson <nyall.dawson at gmail.com> wrote:

> On Tue, 2 Jul 2019 at 01:58, C Hamilton <adenaculture at gmail.com> wrote:
> >
> > Before I go too far with this I want to check to see if the following
> package could be used in QGIS.
> >
> > astropy (https://www.astropy.org/) has a modified BSD-2 license. See
> https://github.com/astropy/astropy/blob/master/LICENSE.rst
> >
> > This would be the library I would pick. It might be an overkill, but in
> the long run it could also be used by anyone with imagery from the Moon,
> Venus, Mars or any of the planets and it would have all the necessary
> functions they would need. The activity on the project is very high. One
> thing I have not checked is to see if their algorithms are historically and
> anciently accurate which would be of interest to archaeologists.
> >
> > An astropy add on is astroplan (
> https://astroplan.readthedocs.io/en/latest/) which has the same license
> and has a number of utilities that use astropy that calculate sunrise,
> sunset, moon phase and illumination. It is not as actively developed, but
> it may not need to be.
> >
> > Skyfield (https://rhodesmill.org/skyfield/,
> https://github.com/skyfielders/python-skyfield/) seems to have a lot of
> the basic routines, but it is primarily developed by one person. It has a
> MIT license, but seems to be actively developed. This might be my second
> choice of libraries.
>
> The problem with both those libraries is that they are Python only --
> this eliminates them as options, since we need c or c++ for it to be
> usable in the 3d engine.
>
> Nyall
>
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