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https://issues.apache.org/jira/browse/LUCENE-2139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965298#action_12965298
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Nicolas Helleringer commented on LUCENE-2139:
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What I do not see today in Solr spatial awareness is spatial indexation with 
tiers

As far as I understand the spatial search is done by two range queries ANDed

Such a search could lead to less performance on big set of data

I am no sure if a two phase filtering is possible on the Solr lvl with phase 1 
been a Tier search a phase 2 a distance refining.

> Cleanup and Improvement of Spatial Contrib
> ------------------------------------------
>
>                 Key: LUCENE-2139
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2139
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/spatial
>    Affects Versions: 3.1
>            Reporter: Chris Male
>            Assignee: Simon Willnauer
>         Attachments: LUCENE-2139-Java5Only.patch, LUCENE-2139-svnScript.sh, 
> LUCENE-2139.patch
>
>
> The current spatial contrib can be improved by adding documentation, tests, 
> removing unused classes and code, repackaging the classes and improving the 
> performance of the distance filtering.  The latter will incorporate the 
> multi-threaded functionality introduced in LUCENE-1732.  
> Other improvements involve adding better support for different distance 
> units, different distance calculators and different data formats (whether it 
> be lat/long fields, geohashes, or something else in the future).
> Patch to be added soon.

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