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Date: Tue, 21 Sep 2010 23:44:35 -0400 (EDT)
From: "Bill Bell (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Issue Comment Edited: (SOLR-2125) Spatial filter is not
 accurate
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    [ https://issues.apache.org/jira/browse/SOLR-2125?page=3Dcom.atlassian.=
jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D12913=
368#action_12913368 ]=20

Bill Bell edited comment on SOLR-2125 at 9/21/10 11:43 PM:
-----------------------------------------------------------

Fixed the distance calc for box. We still need to take the results and do a=
 hsin()

      was (Author: billnbell):
    Fixed old version
 =20
> Spatial filter is not accurate
> ------------------------------
>
>                 Key: SOLR-2125
>                 URL: https://issues.apache.org/jira/browse/SOLR-2125
>             Project: Solr
>          Issue Type: Bug
>          Components: Build
>    Affects Versions: 1.5
>            Reporter: Bill Bell
>            Assignee: Grant Ingersoll
>         Attachments: Distance.diff, solrspatial.xlsx
>
>
> The calculations of distance appears to be off.
> Note: "The radius of the sphere to be used when calculating distances on =
a sphere (i.e. haversine). Default is the Earth's mean radius in kilometers=
 (see org.apache.solr.search.function.distance.Constants.EARTH_MEAN_RADIUS_=
KM) which is set to 3,958.761458084784856. Most applications will not need =
to set this."
> The radius of the earth in KM is  6371.009 km (=E2=89=883958.761 mi).
> Also filtering distance appears to be off - example data:
> 45.17614,-93.87341 to 44.9369054,-91.3929348 Approx 137 miles Google. 169=
 miles =3D 220 kilometers
> http://....../solr/select?fl=3D*,score&start=3D0&rows=3D10&q=3D{!sfilt%20=
fl=3Dstore_lat_lon}&qt=3Dstandard&pt=3D44.9369054,-91.3929348&d=3D280&sort=
=3Ddist(2,store,vector(44.9369054,-91.3929348)) asc=20
> Nothing shows. d=3D285 shows results. This is off by a lot.
> Bill

--=20
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