摘要
地下空间的开发利用要求将地层和地下构筑物进行一体化建模。传统的地学建模方法仅面向地层建模,对地下构筑物考虑较少。基于特征约束的地下空间一体化数据模型将地层的钻孔数据约束和地下构筑物的设计参数约束统一为离散点的特征约束,运用边界表示法对地下空间进行一体化建模,从而将地层建模和地下构筑物建模统一起来,构成地下空间一体化数据模型。该数据模型将地下空间的属性数据和空间数据一体化存储,保证了属性数据和几何数据的关联性、一致性和完整性;另一方面,该数据模型将地下空间的几何信息和拓扑信息分开存储,有利于图形描述、几何特性计算和图形的高分辨率显示。作者阐述了这一模型的基本原理,并给出了数据结构。
It is an urgent demand to model the urban stratum with the underground constructions as a whole. However the, traditional geographic modeling primarily aims at modeling stratum itself and yet gives less concern on the underground constructions. To unify these two separate parts, the 3 D integrated data model based on feature constraints for underground space is put forward. In this data model the property data and spatial data of the objects in underground space are stored in the same sheet, guaranteeing that these two parts of data are associated, consistent and completed. On the other hand the geometric information and topological information are operated separately in favor of the graphic description, computation of geometric property and high definition visualization effectively. This paper gives the principle of this integrated data model and gives its data structure.
出处
《地下空间与工程学报》
CSCD
2007年第2期199-203,共5页
Chinese Journal of Underground Space and Engineering
基金
国家科技部
上海市科委部市合作世博科技专项(05dz05806)
关键词
特征约束
地下空间
三维数据模型
一体化建模
feature constraints
underground space
3 D data model
integrated modelling
