Optimal Setting Of Urban Road Guidance Information In Mountain City

The road network structure of Mountain City is limited by the characteristics of spatial land use,showing a complex form of winding in plane and fluctuating in space.With the acceleration of the pace of urban development,the construction and reconstruction of urban roads become more and more frequent.The setting and updating of Urban Road Guidance Information are in need of systematically design and optimize.On the other hand,due to the limitation of the development of spatial positioning technology and geographic information technology,various navigation systems often make false positioning reports in three-dimensional space.Therefore,this paper puts forward the method of optimizing the setting of Urban Road Guidance Information in Mountain City through the study of the setting of Urban Road Guidance Information System.Firstly,based on the analysis of the spatial structure of the road network in Mountain City,the classification system of Urban Road Guidance Information in Mountain City is constructed.What's more,the system is constructed according to the grade of urban roads and the type of Urban Road Guidance Information.From the overall point of view of Urban Road Guidance Information setting system,the process is divided into three modules:the location of setting,elements of layout and the selection of information.The digital abstract model is constructed separately in the above three aspects..Secondly,based on ArcMap,a desktop component included in ArcGIS 10.1 platform,a geographic information data analysis tool is provided to realize the construction of Road Network Topology in Mountain city.The Road Network Topology constructed in this way can completely realize the abstraction of interchange structure in Mountain city,At the same time,the algorithm flow of road network topology construction is simplified and the traversal efficiency of route information selection process for road network segments and nodes improves in this way of construction of road network topology..Through layered construction of Road Network Topology Structure and digitized abstract model of Urban Road Guidance Information,an intelligent setting algorithm is proposed.In addition,by investigating the demand of the residents for Urban Road Guidance Information in Mountain city,the priority selection of Urban Road Guidance Information and intelligent identification of interchange structure are optimized.In the optimization of priority selection of Urban Road Guidance Information,urban roads in Mountain City are divided into internal roads and external roads,and the construction of classification table system of Urban Road Guidance Information is realized.At the same time,A corresponding optimization algorithm is proposed to solve the problem of continuous selection of Urban Road Guidance Information.In the aspect of intelligent identification of interchange,the quantitative model of basic interchange is proposed by establishing the database of basic interchange structure,and then the design of intelligent recognition algorithm of basic interchange is realized.Finally,the road network around the North Ring Interchange in Yubei District of Chongqing is taken as an example.The evaluation of setting effect of Urban Road Guidance Information Systerm is realized by using the single index evaluation and comprehensive evaluation system.Finally,the feasibility of the research results is verified by comparing and analyzing the difference between manual design results and automatic generation results of Urban Road Guidance Information in Mountain City..