Abstract: This paper researches on the theory and method of curve simulation which has been successfully utilized in the field of plane,automobile and ship design,and exerts curve simulate method to set up digital terrain model in highway alignment CAD.By this method we can easily get digital terrain model

Key words: digital terrain model, Coons curve, curve simulation, modeling

摘要： 将飞机、汽车、造船领域机助设计中曲面拟合的理论与方法运用于路线CAD设计中数字地面模型(DTM)的 建模，是一个值得探讨的课题。笔者研究了基于曲面拟合思想的创建数字地面模型的方法，阐述了该方法的基本 原理、步骤和程序设计，并结合示例进行分析，证明了这一方法不仅可行，而且具有方便迅速的特点

关键词: 数字地面模型, Coons曲面, 曲面拟合, 建模