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https://issues.apache.org/jira/browse/LUCENE-4208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13455768#comment-13455768
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Chris Male commented on LUCENE-4208:
------------------------------------
Things are looking pretty good, we're almost there.
- Where are we on multi-valued fields? In the documentation on
makeDistanceValueSource it doesn't say what happens when multiple values are
indexed. Do we support that in the ValueSource implementations? is the
behaviour undefined? If it is supposed to be defined, can we document it?
- "Returns a ValueSource useful as a score" Can we drop this claim? Part of the
reason we've moved to having ConstantScoreQuerys is that it isn't clear what
the score for the queries should be. This value isn't useful for every spatial
operation or implementation.
Once these have gotten addressed, I'm +1 for committing.
> 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,
>
> 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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