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.
Credit: Netflix
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Артемий Лебедев раскрыл итоги судов с бывшей женойАртемий Лебедев с бывшей женой пришли к мировому соглашению в итоге судов
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Infigratinib靶向的FGFR3(成纤维细胞生长因子受体3)正是驱动ACH疾病发生的关键靶点,2月12日,BridgeBio公布Infigratinib在ACH中取得的首个具有统计学显著改善意义的3期顶线结果,公司计划下半年向FDA提交新药申请。