FWIW I helped someone a few days ago about a similar problem and similarly advised modifying SpatialPrefixTree: http://lucene.472066.n3.nabble.com/PointType-multivalued-query-tt4020445.html
IMO GeoHashField should be deprecated because it ads no value. ~ David On Nov 16, 2012, at 1:49 PM, Scott Smith wrote: > Thanks for the suggestions. I'll take a look at these things. > > -----Original Message----- > From: Mikhail Khludnev [mailto:mkhlud...@griddynamics.com] > Sent: Thursday, November 15, 2012 11:54 PM > To: solr-user@lucene.apache.org > Subject: Re: Custom Solr indexer/searcher > > Scott, > It sounds like you need to look into few samples of similar things in Lucene. > On top of my head FuzzyQuery from 4.0, which finds terms similar to the given > in FST for query expansion. Generic query expansion is done via > MultiTermQuery. Index time terms expansion is shown in TrieField and btw > NumericRangeQuery (it should match with your goal a lot). All these are > single dimension samples, but AFAIK KD-tree is multidimensional, look into > GeoHashField which puts two dimensional points into single terms with ability > to build ranges on them see GeoHashField.createSpatialQuery(). > > Happy hacking! > > > On Fri, Nov 16, 2012 at 10:34 AM, John Whelan <whelanl...@gmail.com> wrote: > >> Scott, >> >> I probably have no idea as to what I'm saying, but if you're looking >> for finding results in a N-dimensional space, you might look at >> creating a field of type 'point'. Point-type fields have a dimension >> attribute; I believe that it can be set to a large integer value. >> >> Barring that, there is also a 'dist()' function that can be used to >> work with multiple numeric fields in order sort results based on >> closeness to a desired coordinate. The 'dist function takes a >> parameter to specify the means of calculating the distance. (For example, 2 >> -> 'Euclidean distance'. >> I don't know the other options.) >> >> In the worst case, my response is worthless, but pops your question >> back up in the e-mails... >> >> Regards, >> John >> > > > > -- > Sincerely yours > Mikhail Khludnev > Principal Engineer, > Grid Dynamics > > <http://www.griddynamics.com> > <mkhlud...@griddynamics.com>
