Quadtrees are everywhere spatial data exists. Mapping services use quadtree-like tile pyramids to serve map tiles at different zoom levels (Bing's quadkey system, for example, addresses tiles as base-4 paths). Game engines use them for collision detection and visibility culling. Geographic information systems use spatial indexes to store and query spatial datasets. PostGIS uses GiST indexes (R-tree-style) for spatial queries on geometries, while PostgreSQL's core supports quadtree-like SP-GiST indexes for certain data types like points.
«Разве это не тот же самый парень, который избил Руслану [Коршунову]», — уточнил в ответном письме Эпштейн и получил подтверждение от Элкхоли.
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Music-lover Adam, 27, from the Wirral said he has been to more than 200 concerts and estimates he goes to just under 30 every year.