城市建模的途径与关键技术

数码城市是信息时代发展的必然产物，城市建模是数码城市的重要内容与基础。到目前为止，城市建模虽然已经成为国内外建立数字城市的热点，人们正在通过各种各样的途径进行城市建模，而且已经取得非常重要的进展，甚至已经成为“产品”被应用于实际生产。但是城市建模还有不少关键问题与技术亟待解决。本文将城市建模分为几何建模与纹理映射两大部分，介绍了他们的基本原理与各种方案、存在的问题及其解决的途径。针对不同应用需求的几何建模途径，包括如何充分利用不同的数据，例如LIDAR数据、地图数据、航空、卫星影像、地面影像，实现房屋几何建模的半自动化；房屋墙面纹理影射的半自动化及房屋墙面纹理遮挡分析、数据压缩等。

Solutions and Core Techniques of City Modeling

City modeling is one of the core techniques and essential steps of realizing Digital City, the inevitable outcome of the information Eva. Nowadays, although City Modeling has become the hotspot of digital city concept all over the world, and many people are trying to realize city modeling in various ways, but there are still lots of technique bottle necks need to be resolved. To meet the rising requirements, here we introduce the essential principle and some solution of city modeling, including some bottle necks and their solutions, such as semi automating of house modeling, semi automatic mapping of house texture, occlusion analyzing of house texture, compressing of data etc.$$$$