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  1. Lucene - Core
  2. LUCENE-7069

Add LatLonPoint.nearest to find closest indexed point to a given query point

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 6.1, 7.0
    • None
    • None
    • New

    Description

      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:

        public static Document nearest(IndexReader r, String field, double lat, double lon) throws IOException
      

      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

      Attachments

        1. LUCENE-7069.patch
          16 kB
          Michael McCandless
        2. LUCENE-7069.patch
          17 kB
          Michael McCandless
        3. LUCENE-7069.patch
          32 kB
          Michael McCandless
        4. LUCENE-7069.patch
          32 kB
          Michael McCandless

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              mikemccand Michael McCandless
              mikemccand Michael McCandless
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