lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-7942) For Geo3d paths, aggregating distance values using "+" is not adequate for squared distances
Date Tue, 29 Aug 2017 13:54:01 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-7942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16145323#comment-16145323
] 

ASF subversion and git services commented on LUCENE-7942:
---------------------------------------------------------

Commit c20d5ca06456ba6ea2e6f5f3341befa579afc276 in lucene-solr's branch refs/heads/branch_6x
from [~kwright@metacarta.com]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=c20d5ca ]

LUCENE-7942: Replace a tab that shouldn't have been there.


> For Geo3d paths, aggregating distance values using "+" is not adequate for squared distances
> --------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-7942
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7942
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/spatial3d
>            Reporter: Karl Wright
>            Assignee: Karl Wright
>             Fix For: 6.7, master (8.0), 7.1
>
>
> The GeoStandardPath object aggregates distances segment by segment using simple addition.
 For some kinds of Distance computations, though, addition is not an adequate way to do this.
 The xxxSquaredDistance computations, for example, do not produce true squared distances but
rather a distance metric that is a combination of both squared and linear.
> I propose adding support in Distance for aggregation, which would allow distance calculators
to compute an accurate distance (at some computational cost) instead.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message