[task #15747] Finding WCS using pixel and celestial coordinates

[Sachin Kumar Singh]

URL:
  <https://savannah.gnu.org/task/?15747>

                 Summary: Finding WCS using pixel and celestial coordinates
                 Project: GNU Astronomy Utilities
            Submitted by: sks_15
            Submitted on: Wed 12 Aug 2020 10:15:01 PM UTC
         Should Start On: Wed 12 Aug 2020 12:00:00 AM UTC
   Should be Finished on: Wed 12 Aug 2020 12:00:00 AM UTC
                Category: None
                Priority: 5 - Normal
              Item Group: New feature
                  Status: None
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                  Effort: 0.00

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Details:

As task #15713 is complete now we have the hashes stored in the KD-tree. Now,
we have both the celestial and pixel coordinates and the next step is to find
wcs.

Some resources I found useful are:

- This <http://iraf.noao.edu/projects/ccdmosaic/astrometry/astrom.html> site
is useful but uses a specific program for its use.

- This
<https://gwcs.readthedocs.io/en/latest/api/gwcs.wcstools.wcs_from_points.html#gwcs.wcstools.wcs_from_points>
site is the python version of the same thing.

- This
<http://astro.physics.uiowa.edu/~kaaret/2013f_29c137/Lab06_astrometry.html>
site is good as well but will have to dig a bit more.

Now we can formulate the general steps using these sites. We'll try to come up
with a way but if there is a general and better way, please comment:-)




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