一种面向对象的三维地下空间矢量数据模型

An Object-Oriented 3D Vector Data Model for Subsurface Modeling

针对地下空间的真三维连续特性以及建模过程的动态交互编辑与分析要求,提出了一种新的三维地下空间矢量数据模型。该模型采用面向对象思想对地下各种空间对象进行抽象描述;利用模型中的线段要素增强几何元素之间拓扑连接关系的维持,为地质体的切割和地下工程体的开挖等分析提供了算法上的便利;引入拓扑面更好地表达了地下空间对象之间的拓扑邻接关系。该模型在三维地下空间数据的存储管理、查询分析以及实时逼真绘制等方面都表现出较好的性能,适用于地下勘探工程的建模与分析。

According to the 3D spatial continuity of subsurface space and requirements of interactive modification and analysis in the process of modeling, an new 3D vector data model for subsurface modeling is proposed. Object-oriented method is adopted to represent all kinds of subsurface spatial objects and important topological connective relations among geometric primitives and spatial objects are well maintained by segment primitives and topological faces, which benefits the implementation of analytical algorithms such as cutting, excavating, topological query and so on. This 3D spatial data model has a good performance in data storage, spatial query and rapid rendering, and can be applied to modeling underground space.