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https://issues.apache.org/jira/browse/SOLR-2125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12913368#action_12913368
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Bill Bell edited comment on SOLR-2125 at 9/21/10 11:47 PM:
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Fixed the distance calc for box. We still need to take the results and do a
hsin()
{code}
this now returns 8 on example data:
http://localhost:8983/solr/select/??fl=*,score&start=0&rows=10&q={!sfilt%20fl=store}&qt=standard&pt=44.9369054,-91.3929348&d=196&sort=hsin%286371,true,store,vector%2844.9369054,-91.3929348%29%29%20asc
Note: 196 km is right
{code}
was (Author: billnbell):
Fixed the distance calc for box. We still need to take the results and do a
hsin()
> 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 (≈3958.761 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 = 220 kilometers
> http://....../solr/select?fl=*,score&start=0&rows=10&q={!sfilt%20fl=store_lat_lon}&qt=standard&pt=44.9369054,-91.3929348&d=280&sort=dist(2,store,vector(44.9369054,-91.3929348))
> asc
> Nothing shows. d=285 shows results. This is off by a lot.
> Bill
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