| Putting forward along with the national strategy of "new-type of urbanization",the progress of the construction of infrastructure in our country. The urbanization development undergoes rapid changes, as a direct result of the demand for urban road network data processing along increasing. This paper researches on the matching problem for urban road network. The main work and innovation points are shown as follows:(1) Research background and status of road networks matching is analyzed, and the main problems in current research are pointed out. From the perspective of human cognition, the differences and similarities with corresponding features, and the dialectical relationship between the two are analyzed. The basic process of matching and the matching strategy for general are introduced. On this basis, the matching strategy of urban road networks based on hierarchical area partitioning is proposed.(2) Research on the hierarchy of road network spatial structure. The road stroke and the basic concept of road net, extraction methods and grade evaluation principle are studied, and the "Node-Arc" data model of road network in the aspect of expressing the deficiencies are analyzed. On this basis, the model of hierarchical area portioning based on road hierarchy is proposed, the expression of spatial structure of road network with the hierarchical characteristics of the rich. Combined with examples, according to the process of model building, selection of high-grade road, the model of hierarchical area portioning and index mechanism of hierarchical area model, the basic principle of the three core problems and implementation process are expounded. Through the analysis of the example result, the effectiveness of the method is proved, which provides important technical support for the subsequent matches.(3) Research on road network matching similarity evaluation index problem. Several kinds of commonly used similarity evaluation indexes and their measurement methods respectively from two aspects of geometry and topology of characteristics are introduced. In view of the current distance measurement methods in expressing the spatial location differences accuracy deficiency of corresponding linear feature, a method of distance measurement for corresponding linear feature is proposed. And through the comparison with other methods, prove that the method has a certain advantage in the measurement accuracy and stability. In this paper, by using the method of statistical analysis respectively on the geometric similarity evaluation described in the space position and morphological differences of several kinds of commonly used indicators combined with the example is analyzed.(4) Research on matching methold of urban road networks based on hierarchical area partitioning. Road network is presented in this paper, on the basis of hierarchical area partitioning based on road hierarchy and connected relationship with the area domain boundaries, across the road in the domain of the division of the gradation, is more efficient than traditional data expression model was established the hierarchical model of the path expression. And then the model of urban road network matching is proposed, matching process and the characteristics of consistency evaluation model for the detail, the method of urban road network matching based on hierarchical area subdivision is formed. In this paper, with the same scale of urban road network data as experimental object, the feasibility of the theories and methods is verified by the experiments. |
