Design and Application of 3D Spatial Database Model for Integrated Management of Aboveground and Underground Features
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摘要: 大规模地上、地下三维实体建模与空间分析应用中，由于三维模型的多样性和对象空间分布的不均衡性，如何高效地一体化组织和管理海量三维空间数据成为当前三维GIS的核心问题之一.提出了一种兼顾空间关系与语义关系的三维空间数据库模型，给出了相应的概念模型、逻辑模型和物理模型.特别针对地质体的复杂性，给出了顾及语义的多尺度地下空间目标概念模型和多层次三维空间索引机制.用武汉市和南京市三维数字城市示范区模型数据进行了应用试验分析，验证了该模型的有效性.Abstract: In the application of large scale aboveground and underground entity 3D modeling and spatial analysis, it is a key issue as how to realize integrated organization and management of massive 3D spatial data efficiently due to the diversity and unbalanced distribution of 3D models. A 3D spatial database model considering spatial and semantic relationships is proposed to solve this problem and corresponding concept model, logical model and physical model are also presented. Especially aiming at the complexity of geological bodies, the multi-scale underground spatial object concept model considering semantic and multi-level 3D spatial index mechanism is put forward. The prototype 3D spatial database management system has been applied in managing and processing 3D digital city model data of Wuhan and Nanjing. The result shows the validity of the proposed 3D spatial database model.
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图 1 地上地下一体化三维空间数据库模型
Fig. 1. 3D spatial database model for integrated management of aboveground and underground features
图 3 多尺度多层次的地下地质体空间目标概念模型
Fig. 3. Multi-scale and multi-layer underground spatial object concept model
图 7 南京城市地质信息系统应用示例
Fig. 7. Application example of Nanjing city geological information system
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