Metadata: Astronomy - reformat "Sky Coverage" ingest and display

[eaquigley]

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Author Name: Eleni Castro (@posixeleni)
Original Redmine Issue: 4052, https://redmine.hmdc.harvard.edu/issues/4052
Original Date: 2014-05-28
Original Assignee: Kevin Condon

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Reformat Sky Coverage to produce a string formatted list of positional vertices taken from the CRVAL1, CRVAL2 values in FITS headers according to the IVOA Space Time Coordinate standard: http://www.ivoa.net/documents/latest/STC.html

Will review this with Gus once we plan to implement.

[eaquigley]

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Original Redmine Comment
Author Name: Leonid Andreev (@landreev)
Original Date: 2014-06-03T01:10:07Z

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This was reviewed with Gus at a recent meeting.
Per his request this is now implemented simply as extracting the X and Y coordinates of the "center pixel", from FITS fields CRVAL1 and CRVAL2, and displaying them as a pair, in parens.
We are NOT going to attempt to calculate the corner coordinates of the rectangular area observed.
For example, for the file M51.34.lmv.fits from Gus's sample collection the value
(201.943583 47.4524998)
will be added to coverage.Spatial in the dataset metadata.

[eaquigley]

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Original Redmine Comment
Author Name: Kevin Condon (@kcondon)
Original Date: 2014-06-27T18:48:32Z

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This will be tested by Gus so closing for now. Will reopen if there is an issue.