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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 Wed, 08 Apr 2015 16:55:13 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-6196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14485525#comment-14485525
] 

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

Thanks.  If this (temporarily at least) resides in lucene, I'll do what is necessary to extend/maintain
it.

It sounds like the SIS people have similar concerns about the search-focus of the package
that I did.  Still, they're welcome to use it as a basis for the 3d package they intend to
develop for the long term.


> 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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