How does this compare to <a href="http:&#x2F;&#x2F;docs.mongodb.org&#x2F;manual&#x2F;applications&#x2F;geospatial-indexes&#x2F;" rel="nofollow">http:&#x2F;&#x2F;docs.mongodb.org&#x2F;manual&#x2F;applications&#x2F;geospatial-index...</a> ?<p>Nevermind, it&#x27;s not open source.