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"This was really an "oh my God" moment," says the scientist behind the findings, Dr Peter Fretwell at British Antarctic Survey, who has worked on Emperor penguins for 20 years.，推荐阅读下载安装 谷歌浏览器 开启极速安全的 上网之旅。获取更多信息
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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.
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