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From "Karl Wright (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-6196) Include geo3d package, along with Lucene integration to make it useful
Date Mon, 02 Feb 2015 16:24:35 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-6196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14301416#comment-14301416
] 

Karl Wright commented on LUCENE-6196:
-------------------------------------

Nicholas,

In the long run I doubt I will continue to have the same restrictions in place as to what
I can contribute to.  But for now, they are what they are, and I have to live within them.

My recommendation: Keep geo3d as a distinct library, within Lucene for the moment, but with
the option of eventually spinning it off or integrating with Spatial4j.  To that end, it would
be ideal if it were packaged in its own jar, etc.


> 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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