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From "Yonik Seeley (JIRA)" <>
Subject [jira] Commented: (SOLR-2125) Spatial filter is not accurate
Date Tue, 21 Sep 2010 01:45:34 GMT


Yonik Seeley commented on SOLR-2125:

Bill, I found two online distance calculators that both give the distance between the points
you provided as 196km.

Now... the distance of 280km you provided should certainly still encompass that, so we still
have a bug anyway.

> Spatial filter is not accurate
> ------------------------------
>                 Key: SOLR-2125
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>          Components: Build
>    Affects Versions: 1.5
>            Reporter: Bill Bell
> 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
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
> 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))
> Nothing shows. d=285 shows results. This is off by a lot.
> Bill

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