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https://issues.apache.org/jira/browse/LUCENE-6607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14625915#comment-14625915
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David Smiley commented on LUCENE-6607:
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One thing I wanted to mention but is now kinda too-late is the name of this
module. When people see the "3d" I think they get the wrong impression of
what's here; ditto for "Geo3d" but at least "geo3d" is actually the package and
name of this body of code -- not spatial3d. So my recommendation would have
been "spatial-geo3d" but it's not a big deal. _Maybe_ one day the intention is
to add all manner of 3d stuff here? But my impression of Geo3d is that only a
few classes if that would be re-used in an un-constrainted 3d space (not
constrained to the surface of a sphere or ellipsoid). When I tell people
what's going on here, I feel the need to start with a disclaimer about what it
_isn't_.
> Move geo3d to Lucene's sandbox module
> -------------------------------------
>
> Key: LUCENE-6607
> URL: https://issues.apache.org/jira/browse/LUCENE-6607
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 5.3, Trunk
>
> Attachments: LUCENE.6607.patch
>
>
> Geo3d is a powerful low-level geo API, recording places on the earth's
> surface in the index in three dimensions (as 3 separate numbers) and offering
> fast shape intersection/distance testing at search time.
> [~daddywri] originally contributed this in LUCENE-6196, and we put it in
> spatial module, but I think a more natural place for it, for now anyway, is
> Lucene's sandbox module: it's very new, its APIs/abstractions are very much
> in flux (and the higher standards for abstractions in the spatial module
> cause disagreements: LUCENE-6578), [~daddywri] and others could iterate
> faster on changes in sandbox, etc.
> This would also un-block issues like LUCENE-6480, allowing GeoPointField and
> BKD trees to also use geo3d.
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