A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.
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2026-02-26 00:00:00:03014222410http://paper.people.com.cn/rmrb/pc/content/202602/26/content_30142224.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/26/content_30142224.html11921 李强同德国总理默茨会谈
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