介绍了基于二维地形图结合Auto CAD软件和Sketch Up软件的三维地貌建模技术,分析了利用等高线数据建模及利用高程离散点数据建模的特点,并在此基础上提出基于等高线与高程离散点联合使用的三维地貌建模方法。这种方法在保证建模速度的同时,能够较好地还原地形地貌,尤其是对微地貌环境的表现。借助三维地貌模型及后期完成的效果图、演示动画等,能够以简明、直观的形式准确传递和表达原始地质信息和工程设计理念,为地质资料的信息化建设提供了有益的探索。 This paper introduces the technology of 3D landform modeling based on 2D topographic map combined with Auto CAD software and Sketch Up software, analyzes the characteristics of using contour data modeling and data modeling using elevation discretization point, and based on this, Three-dimensional topography modeling method combined with discrete points of elevation and elevation. This method can restrain the topography, especially the performance of the micro-topography environment, while ensuring the modeling speed. With the aid of the three-dimensional landform model and the renderings and demonstration animations completed later, the original geologic information and engineering design concept can be transmitted and expressed accurately and concisely in a concise and intuitive way, which provides a useful exploration for the information construction of geological data.