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Posted to dev@lucene.apache.org by "Commit Tag Bot (JIRA)" <ji...@apache.org> on 2013/03/22 17:39:24 UTC
[jira] [Commented] (LUCENE-4208) Spatial distance relevancy should
use score of 1/distance
[ https://issues.apache.org/jira/browse/LUCENE-4208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13610835#comment-13610835 ]
Commit Tag Bot commented on LUCENE-4208:
----------------------------------------
[branch_4x commit] David Wayne Smiley
http://svn.apache.org/viewvc?view=revision&revision=1385122
LUCENE-4208 makeQuery return ConstantScoreQuery, standardize makeDistanceValueSource behavior
> 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
> Assignee: David Smiley
> Fix For: 4.0
>
> Attachments: LUCENE-4208_makeQuery_return_ConstantScoreQuery_and_remake_TwoDoublesStrategy.patch, LUCENE-4208_makeQuery_return_ConstantScoreQuery,_standardize_makeDistanceValueSource_behav.patch, LUCENE-4208_makeQuery_return_ConstantScoreQuery,_standardize_makeDistanceValueSource_behav.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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