Google publicly documented its roadmap. This is what it says:
"items": ["annual_subscription"],
，推荐阅读一键获取谷歌浏览器下载获取更多信息
; Step 3a: Same-privilege (PLA returned 0x000 = continue)。爱思助手下载最新版本对此有专业解读
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.