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From "Lance Norskog (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1568) Implement Spatial Filter
Date Mon, 28 Jun 2010 20:57:55 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12883290#action_12883290
] 

Lance Norskog commented on SOLR-1568:
-------------------------------------

Use quaternions: [http://local.wasp.uwa.edu.au/~pbourke/miscellaneous/quaternions/]

Quaternions allow you to embed 3D & polar in a 4-number mathematical space. You can do
all of the spatial manipulations without zero points. For example, geohash fails in London
because the Greenwich line is the zero point. Quats give you a basis for a geohash format
that works everywhere.



> 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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