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From "David Smiley (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-4208) Spatial distance relevancy should use score of 1/distance
Date Wed, 12 Sep 2012 22:03:08 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-4208?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

David Smiley updated LUCENE-4208:
---------------------------------

    Attachment: LUCENE-4208_makeQuery_return_ConstantScoreQuery_and_remake_TwoDoublesStrategy.patch

This patch is the start of something I hope to finish tonight.  makeValueSource is makeDistanceValueSource
to make abundantly clear.  TwoDoubles is getting overhauled to support the dateline and any
query shape--should probably go into another issue.
                
> Spatial distance relevancy should use score of 1/distance
> ---------------------------------------------------------
>
>                 Key: LUCENE-4208
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4208
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: modules/spatial
>            Reporter: David Smiley
>             Fix For: 4.0
>
>         Attachments: LUCENE-4208_makeQuery_return_ConstantScoreQuery_and_remake_TwoDoublesStrategy.patch
>
>
> The SpatialStrategy.makeQuery() at the moment uses the distance as the score (although
some strategies -- TwoDoubles if I recall might not do anything which would be a bug).  The
distance is a poor value to use as the score because the score should be related to relevancy,
and the distance itself is inversely related to that.  A score of 1/distance would be nice.
 Another alternative is earthCircumference/2 - distance, although I like 1/distance better.
 Maybe use a different constant than 1.
> Credit: this is Chris Male's idea.

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