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<p>I have implemented this in the past, with "millions of features" ... for land
use classification in California..<br>given a reference topological set.. each
polygon in the topology gets an ID, each POINT is assigned to one and only one
poly ID<br>partition on the poly *id* -- no geometry expression in the check
constraints<br><br>Improvements to the method include weighting, and combining
sparse buckets<br>worked great .. -Brian<br><br></p>
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