To counter the splice problem of digital terrain model (DTM) the paper puts forward the algorithm of cutting out of splice line to triangle network. It also introduces for details the basic principle and the main course.

• 该文针对数字地面模型(DTM)的拼接问题提出了基于拼接线对三角网进行裁减的算法,并对其基本原理及主要过程进行了详细介绍。