This page describes an obsolete project.
See SpatialSearch for the Solr geographic data project.
LocalSolr is Solr's facility for incorporating geo-spatial search into Solr. It is built on top of Local Lucene which was contributed to Lucene by AOL.
The main documentation for this extension is at this URL: http://www.gissearch.com/localsolr At some point that information should fold into this page.