r树参考链接

https://blog.youkuaiyun.com/wzf1993/article/details/79547037

https://blog.youkuaiyun.com/jinking01/article/details/116028569

https://www.cnblogs.com/yanghh/p/14141407.html

https://blog.youkuaiyun.com/sjyttkl/article/details/70226192

github
https://github.com/lukas-shawford/rtreelib

https://github.com/moment-of-peace/python-rtree/blob/master/Rtree.py