> Here is a sample of "spatial queries" coming from 
> PS-MOPS (PanSTARRS  Moving Object Pipeline System). One 
> thing orth pointing out is that  in PS-MOPS no spatial 
> queries are ever sent to a database. They are  evaluated 
> by custom code external to the RDBMS.

Thats because the field proximity and orbit proximity code are built
upon the same infrastructure that was used in the development of our
tracklet and track linkage code.

cheers
Andy
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