A method of estabisihing digital terrain models(DTM) with TIN is introduced, and problems during modeling are discussed in the paper. Furthermore,application problems about the hybrid model,as well as the data structure of TIN,are analyzed.

• 介绍了用不规则三角网(TIN)建立数字地面模型(DTM)的基本思路；讨论了在建模过程中所遇到问题的解决方法；分析了混合模型的应用问题及TIN数据结构.