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https://issues.apache.org/jira/browse/SOLR-1568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12883312#action_12883312
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Uwe Schindler commented on SOLR-1568:
-------------------------------------
Grant: Spherical Cap is the way almost all Map-based solutions work to clip out
the current map viewport. If you e.g. Look with Google Earth on the north pole
and use viewport based KML reloading, GE will send a BBOX to your KML producing
servlet only with the south latitude filled and all others are complete open.
So as soon as you cross the pole, it just gets a lessThan/greaterThan.
For crossing the date line, you get a "inverse" BBOX, with EastBoundLongitude <
WestBoundLongitude.
These are the only two special cases in the BBOX model used by maps
applications (Google Earth, Google Maps, WMS/WFS).
> 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: Next
>
> 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,
> 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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