关键词 三维地形可视化；DEM；三维飞行：洪水淹没区 [gap=5492]Key words 3D terrain visualization；DEM；3D flight：Flood subme唱ence area
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This paper briefly discussed the basic content and principles of digital terrain analysis,summarized some models in 3D terrain visualization expression.
本文简要论述了数字地形分析的基本内容和原理,总结归纳了地形三维可视化表达的相关模型。
参考来源 - 数字地形分析与地形三维可视化表达研究·2,447,543篇论文数据，部分数据来源于NoteExpress
As a new technology in surveying profession, 3d terrain visualization is developing boomingly.
地形三维可视化作为测绘行业的一项新技术正处于蓬勃发展阶段。
Visual 3D terrain simulation technology is an important means of virtual reality, which deals with realistic 3D terrain modeling and 3D terrain visualization real-time drawing mainly.
三维地形可视化仿真技术是虚拟现实的重要手段之一，主要研究真实感三维地形建模和三维地形可视化的实时绘制。
Then, 3D visualization and simple spatial analyses are finished with the application of 3D visualization technology. Thus, the study of 3D terrain visualization system with IDL is finished.
在此基础上运用可视化技术实现三维可视化显示及简单的可视化分析，从而完成了地形三维可视化系统的研制。
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