数字城市三维景观模型的建模技术

Modeling technology for 3D landscape models of cybercity

在城市规划、建筑设计中 ,迫切需要采用现代计算机技术进行辅助规划和设计 ,而进行计算机辅助规划和设计的基础是先建立已建城市的三维数字景观模型 ,把城市的地形地貌和各种人工构筑物包括道路、房屋、花园等进行数字化 ,并以三维虚拟形式进行表现 .首先讨论了三维数码城市信息系统的基本概念与要素 ,然后详细介绍和讨论各种地形地物要素建模技术与方法 ,最后以深圳为例介绍通过建模方法所建立的城市三维景观模型 .

There is an urgent need to use modern computer techno logy for aided planning and design in city planning and architecture design. How ever, the basis for computer aided planning and design is establishing the 3D di gital landscape model of the built-up area of the city. To accomplish that, we need to digitize the city landforms and every kind of artificial architectures i ncluding roads, houses, gardens, and so on, then represent them in the form of 3 D virtual reality. First the basic principles of the 3D cyber city information s ystem are discussed. Then, the modeling technology and methodology for various l andforms and features are introduced and discussed. Finally, Shenzhen City is us ed as an example to introduce the established 3D landscape model.