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http://www.sai.msu.su/~megera/wiki/relation_featur%C5s/DB/GiST/pg_sphere/Spatial_Queries
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Дата индексирования: Mon Apr 11 10:55:02 2016
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Spatial Queries
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Classification of spatial queries in astronomy:
Distance based - for given point list all objects within some distance
K-NN (K closest neighbour pairs) - for given point list top K closest objects
K-CP (K - closest pairs) - for given set of objects list top K closest pairs