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To add to the answers and reiterate some points, one uses a spatially-enabled database if you have queries that relate to the spatial relations of the data, a few of which are the following: which points are within x kilometers of my points of interest which points are nearer how far a point is from other point which points are x kilometers ...


Geocouch (which provides R-tree indexing for CouchDB) and CouchDB only support bounding box intersections at this time, though I know that more extended functionality has been in the pipeline for some time. So, if you need a proper intersects function, you will have to write your own Map-reduce function on the results of a bounding box query, which is ...

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