本程序实现对.txt的点云数据的扩充处理。也就是原点云数据量较少，通过将点云数据沿X、Y周对折复制扩充了点云数据量！文件中有一个地形的点云数据供使用！-The program. Expansion of the txt of the point cloud data processing. Is the origin of the cloud less the amount of data through the point cloud data along the X, Zhou Y-fold