Design Of Traffic Network Graph Analysis System

Traffic planning software is an important tool for traffic planning personnel to carry on the traffic planning work,and the traffic network graph analysis system is an important part of the traffic planning software.At present,the domestic market of traffic planning software is occupied by foreign companies,while most of the domestic research on traffic network graph system is based on GIS plug-ins which result in that few studies have completely independent intellectual property rights.Therefore,study on traffic network graphic system with object oriented design method and directly basing on computer graphics engine is significant,since it will gain the complete intellectual property rights.Firstly,a detailed analysis of the basic technology is carried on from three aspects:the GUI framework,the graphics engine and graphics storage method.By analyzing the advantages and disadvantages of similar technology in every aspect,and combining with the demand of technology in this study,Qt is adopted as the GUI framework,Qt Graphics View Framework is used as the graphics engine,and XML is taken as implementation technology of the vector representation of traffic network graphics.Then,expression methods of graphic objects are designed based on XML technology and SVG design concept,and are optimized from the overall graphics level.The style of graphics is designed by following the thought of style's separation from data and by introducing the concept of dynamic attribute value.A simplified interaction mechanism is proposed according to the requirements of traffic network graphics system.Due to all the work,a vector graphics expression method of traffic network is completed.The research on vector expression method of traffic network graphics lays foundation for the design of traffic network graphic analysis system.Finally,a design method of traffic network graphics is proposed based on the object-oriented concept.After requirement modeling,the disadvantages of MVC architecture method are analyzed,and an MVC architecture-based MS VC architecture is proposed.This architecture avoids swollen view layer.Then through the complete database design and detailed class design,an object-oriented traffic network graphic analysis system is completed.