基于CityGML的室內(nèi)導(dǎo)航網(wǎng)絡(luò)自動(dòng)生成方法研究
[Abstract]:As the basic data of indoor navigation, the generation of navigation network is very important to obtain the internal environment of buildings and express the position of objects. However, the traditional methods of navigation network generation are mostly based on the two-dimensional plan of buildings, and lack of comprehensive application of 3D geometric information and semantics. As a three-dimensional indoor model rich in semantic information, the emergence of CityGML LOD4 model provides a new solution for the construction of indoor navigation network. Based on the practical requirements of indoor navigation and the abundant indoor geometry and semantic information of CityGML LOD4, this paper presents an automatic generation method of indoor 3D navigation network based on CityGML LOD4. In order to solve the problem of path generation error in special shape navigation space, the concave polyhedron is subdivided by computational geometry algorithm, and the topological network of indoor navigation is optimized and reconstructed. The experimental results show that the indoor navigation network extracted by this method can solve the problems such as low degree of automation, ignoring semantic and 3D geometric information, and difficult to share navigation network data. It lays a foundation for better realization of indoor navigation and location service. The main contents of this paper are as follows: (1) Indoor navigation data standard introduction. In this paper, CityGML and IndoorGML, are introduced in detail to describe all kinds of information expression in indoor space. In order to illustrate its important role in the automatic generation of indoor navigation network. (2) Indoor navigation requirement analysis and CityGML LOD4 data analysis. Based on the scene and requirement of indoor navigation, this paper discusses the key classes of indoor navigation in CityGML LOD4, and introduces the navigable area and spatial connection, respectively. The analytical process of vertical space and unnavigable area. (3) the automatic construction method of 3D indoor navigation network. Based on the networked representation principle of indoor space, this paper introduces the method of automatically constructing 3D navigation network path from CityGML LOD4, and aiming at the problem of concave polyhedron center falling on its exterior, The concave polyhedron is subdivided by correlation computational geometry algorithm, and the navigation network is reconstructed by taking geometric and semantic information into account. Finally, the convex partition of concave polyhedron is realized based on CGAL. (4) the experiment of building indoor navigation network automatically and the sharing and visualization of navigation network. The 3D indoor semantic model of CityGML LOD4 is established by using 3D semantic modeling and transformation tools. Based on the key technology of automatic construction of 3D indoor navigation network, the automatic construction of 3D navigation network is realized by corresponding experimental means. The standard format of indoor navigation data, IndoorGML, which is easy to share and exchange, is derived. Finally, the online visualization of 3D model and navigation network is realized by using open source technology.
【學(xué)位授予單位】:北京建筑大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:P208
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