| 基于面片集合的三维地籍产权体的拓扑自动构建 |
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| 引用本文： | 郭仁忠,应申,李霖.基于面片集合的三维地籍产权体的拓扑自动构建[J].测绘学报,2012,41(4):620-626. |
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| 作者姓名： | 郭仁忠 应申 李霖 |
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| 作者单位： | 1. 深圳市规划和国土资源委员会,广东深圳518034／武汉大学资源与环境科学学院,湖北武汉430079
2. 武汉大学资源与环境科学学院,湖北武汉,430079 |
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| 基金项目： | 国家自然科学基金，国家公益性行业科研专项 |
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| 摘 要： | 在三维地籍应用需求下,分析当前三维表达和自动构造三维几何体的难点和不足;发展基于面片结构的三维拓扑数据模型,指出三维构体时对面片的基本空间约束;提出基于共享边的离散面片集合来自动构建最小三维封闭体及其拓扑关系的方法,并将该方法用于三维地籍的产权体构建和拓扑建立上,在群集产权体构建上体现较强适宜性,为实现三维产权体的管理提供技术方法。
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| 关 键 词： | 三维地籍 三维最小体 有效性 拓扑关系 |
Automatic Construction of 3D Valid Solids for 3D Cadastral Objects Based on Facet Sets |
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| GUO Renzhong,YING Shen,LI Lin.Automatic Construction of 3D Valid Solids for 3D Cadastral Objects Based on Facet Sets[J].Acta Geodaetica et Cartographica Sinica,2012,41(4):620-626. |
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| Authors: | GUO Renzhong YING Shen LI Lin |
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| Institution: | 1.Urban Planning,Land and Resources Commission of Shenzhen Municipality,Shenzhen 518034,China;2.School of Resources and Environment Science,Wuhan University,Wuhan 430079,China |
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| Abstract: | 3D parcels and their assembly are the primary objects in 3D land administration system.Unfortunately,many methods are developed to validate the single existed solid afterwards,rather than to build the valid 3D solid straightforwardly from the input facets.An effective direct approach is developed to construct the valid solid based on discrete geometric facets,which is vital for 3D cadastral modeling,especially for the collections of 3D property units.The 3D topological mode and the relationships among basic primitives(vertex,edge,facet and solid) are proposed.Based on the prerequisite constraints about initial geometrics and topologies of the input facets,the process of automatic construction of valid solids and their collections is detailed.The approach,automatic construction of valid solids and their aggregation based on discrete facets,satisfies the validation and supports various singularities of 3D solids. |
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| Keywords: | 3D cadaster 3D minimal polyhedron validate solid topological relationship |
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