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https://issues.apache.org/jira/browse/LUCENE-6196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14323655#comment-14323655
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David Smiley commented on LUCENE-6196:
--------------------------------------

Hi Karl,
I plan to incorporate it into Spatial4j, and the first step is an Eclipse "CQ" 
(Contribution Questionnaire) which is part of the IP process for code > 1000 
lines.  I've done that and it needs one more PMC vote there (I think).

p.s. I'm on vacation this week so I may not be so responsive.

> Include geo3d package, along with Lucene integration to make it useful
> ----------------------------------------------------------------------
>
>                 Key: LUCENE-6196
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6196
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: modules/spatial
>            Reporter: Karl Wright
>            Assignee: David Smiley
>         Attachments: ShapeImpl.java, geo3d-tests.zip, geo3d.zip
>
>
> I would like to explore contributing a geo3d package to Lucene.  This can be 
> used in conjunction with Lucene search, both for generating geohashes (via 
> spatial4j) for complex geographic shapes, as well as limiting results 
> resulting from those queries to those results within the exact shape in 
> highly performant ways.
> The package uses 3d planar geometry to do its magic, which basically limits 
> computation necessary to determine membership (once a shape has been 
> initialized, of course) to only multiplications and additions, which makes it 
> feasible to construct a performant BoostSource-based filter for geographic 
> shapes.  The math is somewhat more involved when generating geohashes, but is 
> still more than fast enough to do a good job.



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