The net points of a plane can be mapped onto a se t of integers in a one to one way based on the tree,so can any point of a plan e be approximately mapped onto an integer with arbitrary accuracy.

• 利用该平面坐标网二叉树,把平面中的网格点一一映射到一个整数集合上,从而可以把平面中的任意点近似地映射为一个整数,而且可以任意精确,对任意平面图形图象的处理、储存和传输起着极其重要的作用。