http://www.mongodb.org/display/DOCS/Geospatial+Indexing http://www.mongodb.org/display/DOCS/Geospatial+Indexing I've been doing Geospatial queries lately. It's

http://www.mongodb.org/display/DOCS/Geospatial+Indexing http://www.mongodb.org/display/DOCS/Geospatial+Indexing I've been doing Geospatial queries lately. It's pretty fast when going through 280k+ city coordinates at ~1-20 ms (Can't go lower than ms though) to find cities near [0, 0], [100.752, 120.236], etc.