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.
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04
。同城约会对此有专业解读
На Западе подчинили рой насекомых для разведки в интересах НАТО08:43
It's funny to consider, then, how cash is in fact quite amenable to automation.