分析了3维地籍的需求, 提出了一种适用于3维地籍的混合3维空间数据模型。该模型由表达子模型和计算分析子模型构成, 其中表达子模型用于描述产权体的空间权属范围, 计算分析子模型用于3维地籍的空间分析和计算。两个子模型通过约束Delaunay四面体剖分算法和边界提取算法进行集成与转换。实验结果表明, 所提出的模型和算法有效、可行。

Spatial data model is the basis of three dimensional cadastre. The paper analyzes the application demands of three dimensional cadastre and proposes a hybrid three dimensional spatial data model. The model consists of two sub-models: representing sub-model and calculating-analyzing sub-model. The former is used to represent the geometrical shape of property volumes, and the latter is used to support basic computing and spatial analysis. For the integration and transformation of two sub-models, we introduce the algorithm of Constrained Delaunay Tetrahedralization and the boundary extraction algorithm of TEN. To verify the feasibility of proposed model and algorithms, several typical cases of land space right from Shenzhen are used as test data. Experimental results show that the proposed model and algorithms are effective and feasible.