Search with Polygons: Another Approach to Solr Geospatial Search
by lucenerevolution on May 18, 2012
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Presented by Andrew Urquhart | Raytheon - See conference video - http://www.lucidimagination.com/devzone/events/conferences/lucene-revolution-2012 ...
Presented by Andrew Urquhart | Raytheon - See conference video - http://www.lucidimagination.com/devzone/events/conferences/lucene-revolution-2012
After investigating the Lucene Spatial Playground approach to Solr geospatial search, Raytheon determined that the Lucene Spatial Playground was not evolving in a direction that would meet their needs. In particular, they required the ability to search for documents within a geospatial polygon and also desired a solution that would not require special handling at any point on the Earth specifically including the poles and the 180-degree East/West longitude meridian. Taking these requirements, they implemented a Solr/Lucene geospatial search capability that maps latitude/longitude points onto a spherical Earth and then operates in three-dimensional Cartesian space. Using the geohash algorithm modified to produce Long indices, Raytheon indexes the approximate locations of points as numeric values. This approach enables index lookup using Trie structures with numeric range queries. Come hear about their approach to Solr Geospacial Search.
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