Hi Jamie, Your understanding is inverted. The predicates can be read as: <indexed shape> <predicate> <query shape>.
For indexed point data, there is almost no semantic different between the Within and Intersects predicates. There is if the field is multi-valued and you want to ensure that all of the points for a document are within the query shape (Within predicate) versus any of them being okay (Intersects predicate). Intersects is pretty fast. The Contains predicate only makes sense for non-point indexed data. ~ David On Wed, Aug 12, 2015 at 6:02 PM Jamie Johnson <jej2...@gmail.com> wrote: > Can someone clarify the difference between isWithin and Contains in regards > to Solr's spatial support? From > https://wiki.apache.org/solr/SolrAdaptersForLuceneSpatial4 I see that if > you are using point data you should use Intersects, but it is not clear > when to use isWithin and contains. My guess is that you use isWithin when > you want to know if the query shape is within the shape that is indexed and > you use contains to know if the query shape contains the indexed shape. Is > that right? > -- Lucene/Solr Search Committer, Consultant, Developer, Author, Speaker LinkedIn: http://linkedin.com/in/davidwsmiley | Book: http://www.solrenterprisesearchserver.com
