研究目的:提出一种面体混合的三维地籍数据模型,并对三维地籍的变更及时空关系进行研究,为三维地籍管理提供技术方法。研究方法:在理论分析的基础上,探讨三维地籍数据模型的逻辑模型、物理模型、拓扑关系和时空关系设计,并进行实例验证。研究结果:(1)面体混合的三维地籍数据模型具有逻辑明确、检索方便、运算简单且易于维护等特点,解决了传统三维地籍数据模型在展示效率、拓扑和空间分析等方面的不足;(2)面体混合的三维地籍数据模型基于现有二维地籍数据结构进行扩展,兼容性好、实现成本低;(3)采用二维驱动的三维地籍变更方法,并基于改进的基态修正时空数据模型,实现三维地籍产权体的动态更新和历史关系管理,将三维地籍管理扩展至四维空间。研究结论:建立的三维地籍数据模型,应用于三维地籍管理信息系统建设中,解决了技术瓶颈,实验证明该技术方法可行有效。
The purpose of this paper is to propose a hybrid 3D cadastral data model (H3DCDM) and study on its spatiotemporal relation so as to provide technique method for 3D cadastral management. On the basis of theoretical analysis, combined with relevant research results, the paper discusses the logical model, physical model, topological and spatiotemporal relation designs of H3DCDM, and the example is verified. The results indicate that 1) H3DCDM with clear logic is easy to retrieve and maintain. Those advantages can solve problems of traditional 3D cadastral data model, such as the difficulties of data display, topological and spatial analysis; 2) H3DCDM is based on the existing 2D cadastral data structure. Therefore, it has good compatibility and low cost; 3) the method of 3D cadastral alternation which driven by 2D is adopted to realize dynamic update. Moreover, the improved spatial-temporal data model of base state with amendments is applied to manage the historical relation for property volumes of 3D cadaster. It is concluded that this solution breaks the bottleneck in the information system of 3D cadastral management, which is proved to be practical and effective.