本文在对数字城市的研究体系和三维城市模型进行分析的基础上，着重对数字城市建筑物的构造实体几何(CSG)建模方法进行了研究。
On the basis of analysis of digital city research framework and existing 3d urban model, this paper researches mainly the techniques of building model based on CSG in digital city.
GIS学者在研究三维地形可视化和数字城市可视化时，普遍在地形、城市建筑物的几何模型上叠加了纹理。
The scholars in the GIS domain always add adding texture on geometry model of the 3D things in the study on the 3D terrain and the digital city.
本文介绍一种基于几何和图象的建筑物建模方法。它充分利用了建筑物的特性，使建筑物基本几何模型的恢复变得比较容易。
This paper introduces an architecture modeling method based on geometry and image. the method exploits thoroughly the property of buildings, and make it very easy to recover the geometric model.
本文介绍一种基于几何和图象的建筑物建模方法。它充分利用了建筑物的特性，使建筑物基本几何模型的恢复变得比较容易。
This paper introduces an architecture modeling method based on geometry and image. the method exploits thoroughly the property of buildings, and make it very easy to recover the geometric model.
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