[jira] [Resolved] (LUCENE-7069) Add LatLonPoint.nearest to find closest indexed point to a given query point

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-7069?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless resolved LUCENE-7069.
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    Resolution: Fixed

> Add LatLonPoint.nearest to find closest indexed point to a given query point
> ----------------------------------------------------------------------------
>
>                 Key: LUCENE-7069
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7069
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: master, 6.1
>
>         Attachments: LUCENE-7069.patch, LUCENE-7069.patch, LUCENE-7069.patch, LUCENE-7069.patch
>
>
> KD trees (used by Lucene's new dimensional points) excel at finding "nearest neighbors" to a given query point ... I think we should add this to Lucene's sandbox as:
> {noformat}
>   public static Document nearest(IndexReader r, String field, double lat, double lon) throws IOException
> {noformat}
> I only implemented the 1 nearest neighbor for starters ... I think we can easily generalize this in the future to K nearest.
> It could also be generalized to more than 2 dimensions, but for now I'm making the class package private in sandbox for just the geo2d (lat/lon) use case.
> I don't think this should go into 6.0.0, but should go into 6.1: it's a new feature, and we need to wrap up and ship 6.0.0 already ;)



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