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.
（五）油气田企业跨省、自治区、直辖市销售与生产原油、天然气相关的服务。。WPS下载最新地址是该领域的重要参考
，更多细节参见91视频
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Is it something like this?