Скачать или смотреть Lucene / Solr 4 Spatial Deep Dive

Presentation slides available here: http://www.lucenerevolution.org/?q=20...
Presented by David Smiley, Software Systems Engineer, Lead, MITRE

Lucene's former spatial contrib is gone and in its place is an entirely new spatial module developed by several well-known names in the Lucene/Solr spatial community. The heart of this module is an approach in which spatial geometries are indexed using edge-ngram tokenized geohashes searched with a prefix-tree/trie recursive algorithm. It sounds cool and it is! In this presentation, you'll see how it works, why it's fast, and what new things you can do with it. Key features are support for multi-valued fields, and indexing shapes with area -- even polygons, and support for various spatial predicates like "Within". You'll see a live demonstration and a visual representation of geohash indexed shapes. Finally, the session will conclude with a look at the future direction of the module.