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From "Chris Male (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4208) Spatial distance relevancy should use score of 1/distance
Date Wed, 12 Sep 2012 06:01:09 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13453746#comment-13453746
] 

Chris Male commented on LUCENE-4208:
------------------------------------

I disagree that makeQuery shouldn't exist.  There are optimizations to be had in Query code,
such as using BooleanQuery and its associated highly optimized scorer algs.  I think it should
continue to exist but should have a default implementation that creates a CSQ by calling makeFilter.
                
> 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
>
>
> 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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