处理网格数据点的KDTREE数据结构程序，剔除相同的点-Dealing with grid data points KDTREE data structure procedures, remove the same point

In computer science, a kd-tree (short for k-dimensional tree) is a space-partitioning data structure for organizing points in a k-dimensional space. kd-trees are a useful data structure for several applications, such as searches involving a multidime