多分辨率三维地理空间模型的研究
发布时间：2018-10-18 20:22
【摘要】：随着科学技术的发展，三维电子地图已逐步代替了传统的二维电子地图，成为发展的主要趋势，相比而言，三维地图具有便捷、直观、美观等特性，，这些优点已经深深吸引着大众的眼球。但是现实世界地理信息不是均匀分布的，而是毫无规律不均匀分布的，所以就出现了多分辨率三维地理空间模型。多分辨率三维地理空间模型主要是使用三维显示技术以不同分辨率显示不同区域的地理信息分布。 本文以分辨率、三维空间模型和LOD等概念作为理论基础，分析高程点和等高线表达二维多分辨率地形的缺点，提出了多分辨率三维地理空间模型的概念。根据多分辨率三维地理空间模型的特性，提出了三种表达方式，即详细表达、概括表达和合并表达；简述等高线模型、不规则三角网、规则格网三种常用的三维地形建模方法，在此基础上比较不规则三角网和规则格网各自的优缺点，分析不规则三角网在地形的多分辨率表达中的优势，采用不规则三角网生成多分辨率三维地形模型。提出三维地物的多分辨率表达分为形状、属性和纹理的多分辨率表达，并从确定需要描述的空间对象、三维数据的存储以及逻辑关系的表达、如何显示模型三个方面阐述多分辨地理空间模型的特点。简述各种采集三维数据的方法，分析其在多分辨率三维数据获取中的优劣势，总结多分辨率三维地理空间模型在详细表达区域和概略表达区域的三维数据采集方法。提出了作为多分辨率三维地理空间模型底图的多分辨率电子地图的制作流程和方法，并以“商洛腰市镇三维数字化”项目数据为基础数据进行多分辨率三维地理空间模型实验。多分辨率三维空间模型是地形和地物的匹配集成，阐述在匹配集成时可能遇到的问题，并提出解决方法，然后在ArcScene平台下将多分辨率空间模型进行三维显示。
[Abstract]:With the development of science and technology, 3D electronic map has gradually replaced the traditional two-dimensional electronic map and become the main trend of development. These advantages have attracted the attention of the public. However, the real world geographic information is not uniformly distributed, but not uniformly distributed, so there is a multi-resolution three-dimensional geospatial model. Multiresolution 3D geospatial model mainly uses 3D display technology to display geographic information distribution of different regions with different resolutions. Based on the concepts of resolution, three-dimensional spatial model and LOD, this paper analyzes the shortcomings of elevation points and contour lines in representing two-dimensional multi-resolution terrain, and puts forward the concept of multi-resolution three-dimensional geospatial model. According to the characteristics of the Multiresolution 3D Geospatial Model, three kinds of expression methods are put forward, which are detailed expression, general expression and combined expression, three common 3D terrain modeling methods, I. E. contour model, irregular triangular network and regular grid. On this basis, the advantages and disadvantages of irregular triangulation and regular grid are compared, and the advantages of irregular triangulation in the multi-resolution representation of terrain are analyzed, and the multi-resolution 3D terrain model is generated by irregular triangulation. The multi-resolution representation of 3D objects is divided into multi-resolution expression of shape, attribute and texture, and the spatial objects to be described, the storage of 3D data and the expression of logical relations are determined. How to display the model in three aspects to illustrate the characteristics of the Multiresolution Geospatial Model. This paper briefly introduces various methods of collecting 3D data, analyzes their advantages and disadvantages in the acquisition of multi-resolution 3D data, and summarizes the methods of 3D data acquisition of multi-resolution 3D geo-spatial model in detail and in general. This paper presents the process and method of making Multiresolution Electronic Map as the base map of Multiresolution 3D Geospatial Model. Based on the project data of "3D digitization of Shangluo Town", the experiment of Multiresolution 3D Geospatial Model is carried out. Multi-resolution three-dimensional space model is the matching integration of terrain and features. The problems that may be encountered in matching integration are expounded and the solution is proposed. Then the multi-resolution spatial model is displayed on ArcScene platform.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208
本文编号：2280267
[Abstract]:With the development of science and technology, 3D electronic map has gradually replaced the traditional two-dimensional electronic map and become the main trend of development. These advantages have attracted the attention of the public. However, the real world geographic information is not uniformly distributed, but not uniformly distributed, so there is a multi-resolution three-dimensional geospatial model. Multiresolution 3D geospatial model mainly uses 3D display technology to display geographic information distribution of different regions with different resolutions. Based on the concepts of resolution, three-dimensional spatial model and LOD, this paper analyzes the shortcomings of elevation points and contour lines in representing two-dimensional multi-resolution terrain, and puts forward the concept of multi-resolution three-dimensional geospatial model. According to the characteristics of the Multiresolution 3D Geospatial Model, three kinds of expression methods are put forward, which are detailed expression, general expression and combined expression, three common 3D terrain modeling methods, I. E. contour model, irregular triangular network and regular grid. On this basis, the advantages and disadvantages of irregular triangulation and regular grid are compared, and the advantages of irregular triangulation in the multi-resolution representation of terrain are analyzed, and the multi-resolution 3D terrain model is generated by irregular triangulation. The multi-resolution representation of 3D objects is divided into multi-resolution expression of shape, attribute and texture, and the spatial objects to be described, the storage of 3D data and the expression of logical relations are determined. How to display the model in three aspects to illustrate the characteristics of the Multiresolution Geospatial Model. This paper briefly introduces various methods of collecting 3D data, analyzes their advantages and disadvantages in the acquisition of multi-resolution 3D data, and summarizes the methods of 3D data acquisition of multi-resolution 3D geo-spatial model in detail and in general. This paper presents the process and method of making Multiresolution Electronic Map as the base map of Multiresolution 3D Geospatial Model. Based on the project data of "3D digitization of Shangluo Town", the experiment of Multiresolution 3D Geospatial Model is carried out. Multi-resolution three-dimensional space model is the matching integration of terrain and features. The problems that may be encountered in matching integration are expounded and the solution is proposed. Then the multi-resolution spatial model is displayed on ArcScene platform.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208
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