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https://issues.apache.org/jira/browse/LUCENE-2151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simon Willnauer reassigned LUCENE-2151:
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Assignee: Simon Willnauer
> Abstract the distance calculation process in the Spatial contrib
> ----------------------------------------------------------------
>
> Key: LUCENE-2151
> URL: https://issues.apache.org/jira/browse/LUCENE-2151
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/spatial
> Affects Versions: 3.1
> Reporter: Chris Male
> Assignee: Simon Willnauer
> Attachments: LUCENE-2151.patch
>
>
> The spatial contrib shouldn't tie users to one particular way of calculating
> distances. Wikipedia lists multiple different formulas for the great-circle
> distance calculation, and there are alternatives to that as well. In a
> situation where many documents have the same points, it would be useful to be
> able to cache some calculated values as well (currently this is sort of
> handled in the filtering process itself).
> This issue addresses this by abstracting away the distance calculator,
> allowing the user to provide the implementation of choice. It would then be
> possible to swap in different distance calculation strategies without
> altering the distance filtering process itself.
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