Presented by Ishan Chattopadhyaya, LucidWorks
This talk is on the technical aspects of a new OpenStreetMap geocoder based on Apache Solr & Lucene. Recent changes to Apache Lucene and Apache Solr (4.0 and onwards) have seen a marked improvement in the spatial search capabilities. Also, its improved support for distributed storage and search, via the SolrCloud mode, makes applications using Solr scale easily. OpenStreetMap's current geocoder, Nomainatim, is based on Postgresql/PostGis. Some benefits of using Solr (as compared to a database system like Postgres) for building a geocoder, is robust partial text search, analysis in various languages (stemming, tokenization, stop words etc.), spell check, faceting, highlighting etc. Through this presentation, the author intends to bring out an appreciation for a Solr based geocoder.