城市三维地理信息系统中三维模型的快速构建方法  

Research on Fast Construction Method of 3D Models in 3DUGIS

作　　者：朱国敏 马照亭[2] 孙隆祥[2] 李成名[2] 

机构地区：[1]义乌市勘测设计研究院,浙江义乌322000 [2]中国测绘科学研究院,北京100039

出　　处：《地理与地理信息科学》2007年第4期29-32,40,共5页Geography and Geo-Information Science

基　　金：地理空间信息工程国家测绘局重点实验室资助项目(200603)

摘　　要：大规模三维模型的快速构建一直是影响城市三维地理信息系统(3DUGIS)发展的一个重要因素。基于3DUGIS中景观模型的表达原则与分类,分别针对抽象的点、线、面状对象提出符号匹配和三角剖分的批量三维模型构建方法。这种建模方法方便、快捷、自动化程度高,可广泛应用于城市景观中地面、河流、道路、绿地、规则建筑物、地下管线等地物的三维建模。通过对上述三维模型快速构建方法的实现,验证了三维模型生成的效果和效率。The fast construction of massive three-dimensional models is always an obstacle in the developing of three-dimensional urban geographic information system （3DUGIS）. Based on the simplification expression principles and amplification classification of urban models, this paper puts forwards a fast model-construction method with symbol matching and polygons triangulation respectively to punctate, linear and polygonal objects. For 2D points or lines vector, diverse models are made automatically to vary 3D symbols with spatial parameters, such as position, translation and scale. For 2D polygons vector, triangulating them and constructing regular 3D models is procedural and fast. Practice shows that this method is good-effect and efficient and can be widely used to modeling terrain, river, road, tree, greenbelt, regular buildings, underground pipelines etc.

关 键 词：城市三维地理信息系统(3DUGIS) 三维模型 符号匹配 三角剖分 

分 类 号：P208[天文地球—地图制图学与地理信息工程]