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Has any of you had any experience with using NoSQL (non-relational) databases to store spatial data? Are there any potential benefits (speed, space, ...) of using such databases to hold data for, say, a desktop application (compared to using SpatiaLite or PostGIS)?
I've seen posts about using MongoDB for spatial data, but I'm interested in some performance comparison.
Cassandra is also an option for spatial data:
http://www.readwriteweb.com/cloud/2011/02/video-simplegeo-cassandra.php