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https://issues.apache.org/jira/browse/LUCENE-6487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14547923#comment-14547923
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Karl Wright commented on LUCENE-6487:
-------------------------------------
I'm making good progress on this work. The only code remaining that needs
functional updating is the bounds computation, which will probably take a
couple of days. I also need some help from Nicholas making sure that the
ellipsoid coefficients are in fact correct for WGS84, and writing some
WGS-specific tests.
I'm attaching a preliminary patch, which contains all the structural changes
necessary, plus everything other than the code listed above. It is for
reference/review purposes only and should not yet be committed.
> Add WGS84 capability to geo3d support
> -------------------------------------
>
> Key: LUCENE-6487
> URL: https://issues.apache.org/jira/browse/LUCENE-6487
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/spatial
> Reporter: Karl Wright
>
> WGS84 compatibility has been requested for geo3d. This involves working with
> an ellipsoid rather than a unit sphere. The general formula for an ellipsoid
> is:
> x^2/a^2 + y^2/b^2 + z^2/c^2 = 1
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