Research And Feature Analysis Of Random Motion Simulation Based On Road Data Extraction

Road traffic problems can be seen everywhere in people's daily life,road safety directly affects people's travel.Because of the clearly spatial location characteristics of traffic accidents in dangerous road,Geographic Information System(GIS)is the key approach to solve the problems related to geographical location.Using ArcGIS technology,this thesis extracts road data in vector map,and combines with the random motion point to construct the simulation model of the road network and random motion.In order to the application of vector data model theories and methods for the design and analysis of a case of road traffic situation in different city,for road traffic,road simulation,the road network modeling,road analysis,accident prediction and risk mitigation,to provide reference and provide a theoretical basis for data.Firstly,this thesis introduces the current situation of traffic accident safety management and the research of dangerous road network construction and stochastic mobile model at home and abroad.Meanwhile,the concept,function and characteristics of ArcGIS software architecture are described and analyzed.On this basis,three key problems of dangerous road and dangerous information management are analyzed,that is,building road data vector model,moving node behavior model and simulation data analysis.Secondly,For the sum of the three key issues.According to the rules of road network construction,different road data models are constructed.And then according to the principle of vehicle driving,a moving point simulation model is constructed to simulate the road scene.This model uses ArcGIS technology to generate the road vector diagram to realize the coordinate transformation of the road topology map,and then obtain the road data model.Combining the node motion simulation model,this model constructs two kinds of road data models(connectivity and non-connected graph),and uses ArcGIS Engine development technology,the road data model for visual display.Finally,the simulation data are analyzed,and the motion trajectory of the moving point of the vehicle,the degree of travel of the node,the degree of degree and degree distribution,the degree of travel of the road network,the degree and degree distribution are drawn.The simulation results show that the model take into account the direction,weight(the distance between two coordinate points)and the random join of nodes can truly reflect the actual dynamic process of the dynamic simulation model of the moving point based on the road data extraction.