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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1568) Implement Spatial Filter
Date Mon, 28 Jun 2010 21:33:52 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12883312#action_12883312
] 

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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