The three-dimensional modeling is an essential task in 3D GIS, and its speed depends on the speed of capturing texture to some extent. With the further promoting of the construction of three-dimen sional digital cities, the traditional method of taking photos with camera can not meet the requirements of fast getting texture,thus,this paper presents a method of constucting aerial photograph texture library in 3D scene,its core problems are indexing between models and aerial photographs and extracting texture in formation. Based on 3D GIS platform, we have analysed and researched the core issues of building the li brary, and through the design of algorithms, we realized texture matching of building's facades. Experiments show that the method is simple, rapid and suitable for 3D modeling in wide-area.%三维建模是3D GIS中一项基本任务,其速度在一定程度上取决于纹理获取的速度.随着三维数字城市建设的推进,传统的相机拍照法已不能满足快速获取纹理的要求,为此,提出一种在3D场景中构建航片纹理库的方法,其核心问题是模型与航片间索引的建立和纹理信息的提取.基于3D GIS平台,对建库的核心问题进行分析与研究,并且通过设计算法,实现建筑物侧面的纹理匹配.实验证明,这种方法简单、快速,适合广域3D建模.
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