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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上訴庭認為，力高佔用處所違反租賃條款。但在隱瞞方面，按照普通法，合約方一般無責任披露自己違約的事。
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第六十七条 本法所称网络犯罪，是指针对或者主要利用网络实施的危害国家安全、公共安全、公民人身财产安全等犯罪。
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