The OpenStreetMap Foundation (OSMF) osmfoundation.org🇬🇧
Continue reading...
。业内人士推荐WPS官方版本下载作为进阶阅读
The spatial view (the grid of rectangles) and the tree view (the hierarchy of nodes) represent the same structure. Searching for a point means walking down the tree: at each node, you check which of the four children contains your target coordinate and recurse into that child. You never visit the other three.
Norfolk Museums Service