摘要
研究了三维城市模型数据数据交换格式C ityGML,阐述了C ityGML三维城市建模的基本概念,重点介绍其数字地形模型和建筑物模型。C ityGML基于GML3开发,提供了描述三维城市对象的公共信息模型,涵盖了几何、拓扑、语义等方面。在C ityGML中,对象的空间属性和语义属性通过5个连续的细节层次进行组织。
Virtual 3D city models provide important information for different aspects in a lot of domains. Up-todateness of and flexible access to 3 D city models are of utmost importance in some situations such as emergency response. In this paper we introduce CityGML, a common information model for representing 3 D urban objects and interoperable access to 3 D city models over the Internet. Based on the standard GML3, CityGML covers the geometrical, topological, and semantic aspects of 3D city models. In CityGML, spatial and semantic properties of 3D urban objects are structured in five consecutive levels of detail. Throughout the paper, special focus is on the digital terrain model and building model of CityGML.
出处
《城市勘测》
2010年第B06期5-7,42,共4页
Urban Geotechnical Investigation & Surveying
