Study Of Expression About City Dynamic Traffic Electronic Map

The Intellectual Traffic System (ITS) is an important means to solve modern social traffic contradiction. Intelligent traffic system as one of the core technologies in the vehicle navigation system is the hot research field in world countries. In car navigation systems, user terminals can receive traffic information from service system which released by the dynamic traffic information. traffic management systems can be combined Vehicle Location subsystem identified by the vehicles on the road network are located, provide Traveler optimal target routes, in order to achieve rapid, safe, comfortable travel and economic purposes.Most information of Intellectual Traffic System (ITS) need representing by electronic map. The past electronic map used for navigating seldom includes dynamic traffic information, especially lack the description of the traffic jam situation of the road. Probably the paces of advancing of the rate of traffic flow are different on different lanes on a road, so although belong to a road, the traffic flow information formed in each lane is not the same, so it is necessary to carry on the management of segmenting to an intact road, enable each highway section to express information of its rate of traffic flow.The electronic map of dynamic traffic information that this text is devoted to studying is exactly based on this point to consider, technology carry on attribute to divide to the concrete road to plan to adopt segmenting dynamically, combine the collection of real-time and dynamic traffic information, the formulation of GPS real-time information utilizes and segments dynamically technology and relevant algorithms are produced the dynamic picture layer, superpose on the electronic map and express visually, in order to form the course of studying of the electronic map of the dynamic real-time traffic information of reflection.This paper focuses on the main aspects:1. navigation node layer and layer and sections of the GPS pilot database design;2. road traffic information to the dynamic segmentation technology research;3. Using GPS information generation traffic information useful as a means;4. Based on the dynamic segmentation of the road traffic situation in the visual expression.