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https://issues.apache.org/jira/browse/LUCENE-3795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13209553#comment-13209553
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David Smiley commented on LUCENE-3795:
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The spatial-lucene module of LSP has 3 main packages: 'base', 'strategies', and
'benchmark'. It also has a fair amount of tests.
h3. Base
Major pieces in 'base':
* SpatialContext interface and simple implementation
* Distance math code
* Shapes interface and implementations
* PrefixTree/Trie (grid) interface and implementations (e.g. geohash)
h3. Strategies
The "strategies" portion of this module contains spatial indexing/search
implementations using Lucene.
Major interfaces (just one):
* SpatialStrategy (including abstract PrefixGridStrategy)
Major implementations:
** *RecursivePrefixTreeStrategy*
*** This is the main strategy, based on SOLR-2155. It uses an abstract class
SpatialPrefixTree which has geohash and quadtree implementations.
** TermQueryPrefixTreeStrategy
** TwoDoubleStrategy
*** Akin to Solr's LatLonType, although some edge cases not yet implemented.
h3. Benchmarking
Benchmarking is a TBD; there's the start of some code there but nothing real. 1
year ago I did benchmark SOLR-2155 (with great results) and posted my benchmark
code here LUCENE-2844 in the interest of transparency.
h3. Testing
Testing so far hasn't been aimed directly at increasing code coverage, it's
been aimed at finding nasty corner cases in spatial. Spatial code is highly
prone to edge cases.
> Replace spatial contrib module with LSP's spatial-lucene module
> ---------------------------------------------------------------
>
> Key: LUCENE-3795
> URL: https://issues.apache.org/jira/browse/LUCENE-3795
> Project: Lucene - Java
> Issue Type: New Feature
> Components: modules/spatial
> Reporter: David Smiley
> Assignee: David Smiley
> Fix For: 4.0
>
>
> I propose that Lucene's spatial contrib module be replaced with the
> spatial-lucene module within Lucene Spatial Playground (LSP). LSP has been
> in development for approximately 1 year by David Smiley, Ryan McKinley, and
> Chris Male and we feel it is ready. LSP is here:
> http://code.google.com/p/lucene-spatial-playground/ and the spatial-lucene
> module is intuitively in svn/trunk/spatial-lucene/.
> I'll add more comments to prevent the issue description from being too long.
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