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From "Jeroen Steggink (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-5016) Spatial clustering/grouping
Date Fri, 12 Jul 2013 13:51:48 GMT

    [ https://issues.apache.org/jira/browse/SOLR-5016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13706942#comment-13706942
] 

Jeroen Steggink commented on SOLR-5016:
---------------------------------------

Grid based faceting is also a kind of clustering, though not dynamic, but fixed, and would
be a great addition to the spatial features.

Region based clustering could indeed be solved by field value faceting on terms. However,
if it wouldn't be based on terms but based on polygons it would be something different. I
haven't yet tried to create facet queries based on BBOXs.

                
> Spatial clustering/grouping
> ---------------------------
>
>                 Key: SOLR-5016
>                 URL: https://issues.apache.org/jira/browse/SOLR-5016
>             Project: Solr
>          Issue Type: Wish
>          Components: spatial
>            Reporter: Jeroen Steggink
>            Priority: Minor
>              Labels: clustering, grouping, spatial
>
> Hi,
> It would be great if we could have some sort of spatial clustering/grouping of points
for efficiently plotting them on a map.
> I could think of clustering based on the following parameters:
> - Based on regions: continents, countries, statis, cities, etc;
> - A fixed number of clusters;
> - Radius, bbox, polygon
> Retrieved result would give the center of the cluster, average location or a polygon
of the cluster.
> An example of a usecase would be something like this:
> https://developers.google.com/maps/articles/toomanymarkers#markerclusterer
> Jeroen

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