Research On Visualization Of Urban Area Division Based On Traffic Trajectory Data

With the improvement of the urban road monitoring equipment,the continuous amelioration of radio communication technology and the use of positioning terminal device,huge amounts of traffic trajectory data including time and location information are generated.The traffic trajectory data records the relevant information of vehicle movement and resident travel,and has become an important data resource which has the characteristics of large data volume,high density,rapid growth and et al.It can not only reflect real traffic status of urban road networks(the level of the road traffic congestion),but also can analyze the characteristics of the mobile object(where to stay,and often where to go)and urban traffic area changes by means of traffic trajectory data.The study of traffic trajectory data can be applied to many important fields,such as meteorology,urban planning,tourism and other departments.Therefore,an effective way is desiderate to analyze the regular information that hide behind the volume data and the emergence of visualization technology makes it easier to process and analyze.Based on it,the GPS trajectory data of the floating car in Zhang Dian district and Lin Zi District of Shandong province is taken as a research example which based on the urban road network.The main research contents are as follows:(1)According to the characteristics of GPS track data and road network data,the GPS track data cleaning condition,coordinate transformation mechanism and the principle of two optimization of road network data are defined.Two revised data provide the data support for the following visual interface simulation design and the visualization results.(2)Propose the visual computing method,mainly includes map matching and cluster analysis map matching and clustering analysis.The basic idea and process of map matching are described and the keynote is complex sections.C lustering analysis is to cluster the matching dataset in the road network through different experimental parameters,and obtain the result that the data can be kept in a complete and consistent with the visual criteria.(3)Put forward the method of visual platform design and design the relevant evaluation criteria to get the urban area division model,then make a comparative analysis with the actual layout of Bai Du map.The visualization results can provide reference for urban planning,policy formulation and guide residents' travel in order to solve the objective problems existing in urban road planning now and guide the healthy planning of future urban development.