Karl Wright created LUCENE-6487:
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             Summary: 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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