摘要
地上下空间数据集成是数字城市、数字矿山与数字岩土工程建设中地上下无缝集成建模的关键。在空间数据集成内涵分析的基础上,讨论了地上下空间数据集成的机制与原理,提出地上下空间数据集成的初步方案。通过对Open GIS简单要素规范进行扩展,强调"体"的引入对三维空间数据集成的重要性,针对地上建筑、地形和地层建模分别采用CSG、CD-TIN和GTP模型的特例,提出了对CSG+CD-TIN+GTP模型数据进行集成的数据组织结构;并且设计了一种基于拓扑三角形集(TTS)进行地上下空间数据集成的技术框架,提出集成模型数据表达的方法。结合某城市地上下空间建模应用实例,给出基于TTS进行地上下空间数据集成与建模的效果。
Aground-underground spatial data integration is the key of seamless integrated spatial modeling of aground-underground objects in the construction of digital city, digital mine and digital civil engineering. Based on analyzing to the connotation of spatial data integration,the mechanism and the principle of spatial data integration of aground and underground objects were discussed,and a preliminary solution for the spatial data integration of aground-underground objects was proposed in this paper. By introducing body-primitive, the Open GIS Simple Features Specification was extended, which is meaningful for 3D spatial data integration. For the integrated spatial modeling of surface buildings, terrain and strata respectively with CSG, CDTIN and GTP model, a specified data organization structure for CSG＋CDTIN＋GTP integrated model data was given. Meantime, based on topological triangular sets （TTS） a technology framework for aground-underground spatial data integration was designed, and the corresponding method to describe the integrated model data was proposed. With the aground-underground integrated spatial modeling of a city college being a case, the effect of aground-underground spatial data integration and 3D modeling based on TTS was shown.
出处
《地理与地理信息科学》
CSCD
北大核心
2009年第1期64-67,共4页
Geography and Geo-Information Science
基金
国家杰出青年基金项目(50525414)
国家自然科学基金项目(40571137)
国家863计划项目(2006AA12Z216)
作者简介
张元生（1982-），男，博士研究生，主要从事空间数据集成组织与数字矿山等研究。E-mail：zysdicky@126．com
