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https://issues.apache.org/jira/browse/SOLR-1568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12853377#action_12853377
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Yonik Seeley commented on SOLR-1568:
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bq. I wonder if we shouldn't also pass along the request parameters on this,

IIRC, you pass along the QParser, and that has pointers to the complete context 
- stuff like the request object.

> Implement Spatial Filter
> ------------------------
>
>                 Key: SOLR-1568
>                 URL: https://issues.apache.org/jira/browse/SOLR-1568
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Grant Ingersoll
>            Assignee: Grant Ingersoll
>            Priority: Minor
>             Fix For: 1.5
>
>         Attachments: CartesianTierQParserPlugin.java, 
> SOLR-1568.Mattmann.031010.patch.txt, SOLR-1568.patch, SOLR-1568.patch, 
> SOLR-1568.patch, SOLR-1568.patch, SOLR-1568.patch, SOLR-1568.patch
>
>
> Given an index with spatial information (either as a geohash, 
> SpatialTileField (see SOLR-1586) or just two lat/lon pairs), we should be 
> able to pass in a filter query that takes in the field name, lat, lon and 
> distance and produces an appropriate Filter (i.e. one that is aware of the 
> underlying field type for use by Solr. 
> The interface _could_ look like:
> {code}
> &fq={!sfilt dist=20}location:49.32,-79.0
> {code}
> or it could be:
> {code}
> &fq={!sfilt lat=49.32 lat=-79.0 f=location dist=20}
> {code}
> or:
> {code}
> &fq={!sfilt p=49.32,-79.0 f=location dist=20}
> {code}
> or:
> {code}
> &fq={!sfilt lat=49.32,-79.0 fl=lat,lon dist=20}
> {code}

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