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.
本届大会将邀请近500家国内外知名企业参加，有戴尔、阿斯利康、GE、赛诺菲、海尔等行业龙头企业，也有博枫资产、KKR、启明创投等知名投资机构，还有MiniMax、追觅科技、地平线等新锐创新力量。
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Никита Абрамов (Редактор отдела «Россия»)