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.
Pruned images: 0 (layers: 0, objsize: 36.9 MB)，这一点在Line官方版本下载中也有详细论述
。业内人士推荐搜狗输入法下载作为进阶阅读
Фото: Vladimir Razgulyaev / Shutterstock / Fotodom。safew官方版本下载对此有专业解读
原文来自:http://blog.daimajiangxin.com.cn
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