Automatic Generation System for 3-D Urban ModelSpatial Data

一旦将城市环境投影到三维虚拟空间中，就可以对其进行修改和利用，进行各种模拟。虚拟空间中的三维城市模型是景观评价、城市规划、土木工程建筑、防灾模拟等领域的重要信息基础设施。此外，为了鼓励公众参与城市规划，向公众公开公共项目信息是三维城市模型发挥巨大作用的一个新的应用领域。因此，有必要在三维城市模型中高效地创建建筑物、道路、桥梁、塔楼等设施对象。手动创建这些对象的形状和纹理贴图需要大量的人力和时间。因此，我们的目标是生成三维城市模型，特别是自动生成建筑模型。在本研究中，我们提出了将CG与地理信息系统相结合的城市三维模型自动生成系统。利用地理信息系统软件组件开发了处理二维地理信息的地理信息系统应用程序。另一个控制3D CG软件的程序接收处理后的信息并自动生成3D城市模型

Once urban environment is projected into 3-D virtual space, it can be modified and utilzed for various simulations. 3-D urban model in virtual space is the important information infrastructure that can be utilized in several fields, for example, landscape evaluation urban planning civil engineering architecture, disaster prevention simulation, etc. In addition disclosure of information about public projects to the public in order to encourage their participation in urban planning is a new application area where 3-D urban model can be of great use. So it is necessary to create objects in 3-D urban model such as buildings, roads, bridges, towers and other utilities efficiently. The manual creation of the shapes and the texture mapping for these objects require lots of labor and time. Therefore, we aim at generating 3-D urban models, especially building models automatically. In this research, we propose the system to generate 3-D Urban Models automatically by the Integration of CG and GIS. The GIS application has been developed to process 2-D GIS information, using GIS software component. Another program that controls 3-D CG software receives the processed information and generates 3-D Urban Models automatically