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.
圖像加註文字,預算管理局局長羅素・沃特(Russell Vought)於七月在美國國會大廈接受記者訪問多名「2025計劃」撰稿人如今位居特朗普政府要職,包括中情局(CIA)局長拉特克利夫(John Ratcliffe)、聯邦通訊委員會(FCC)主席布蘭登·卡爾(Brendan Carr)、特朗普的「邊境沙皇」湯姆·霍曼(Tom Homan)、證券交易委員會主席保羅·阿特金斯(Paul Atkins),以及主張關稅政策的貿易顧問彼得·納瓦羅(Peter Navarro)。
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