由于GIS(地理信息系统)软件尚无统一、完备的数据模型，作者对GIS的数据进行了建模，以三维城市房屋可视化模型为例，以面向对象的思想构造了三维矢量的数据结构，并提出了一种以关系数据库为核心、引入面向对象机制的数据组织方法，以此管理图形数据和属性数据．%With the development of GIS technology，currently, construction of 3D Model is becoming the internal and abroad hotspot. The construction of 3DGIS is discussed. Taking model of 3D urban building visualization as an example, a 3D object-oriented 3D vector data structure is built. When organizing data, RDBS, which is the core and meanwhile, added with Object-oriented mechanism, is adopted, which made it possible to manage graphic data and property data at the same time by RDBS.
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