The Research Of Logistics And Vehicles MIS Based On GPS/GIS

It is urgent to establish Vehicle Location and Management System with development of road transport production and business. The techniques such as GPS, data communications, database and GIS can be used for real-time vehicles tracking and monitoring make vehicle management achieve the modernization and scientific.GPS is one of the best navigation system with many characteristics such as all-weather, high-precision, automated, high efficiency, wide application. GPS satellite navigation information is available for lots of users to share information resources. If they have GPS receiver, it can be used to navigate and locate by GPS signal measurement at any time. Location and navigation services base on GIS, and it can provide a visual platform for vehicle monitoring and data saving. The services scope and users of Monitoring Center are decided by capacity and coverage of communication network. If data between control center and vehicle transmits by GPRS or GSM SMS, there are many advantages such as extensive coverage, fewer blind areas, communication quality, low bit error rate, low cost, high reliability etc. And voice communications and data communications can be carried out simultaneously. So it is widely used for the vehicle monitoring system. Moreover, such communication is extensive coverage, capacity, low cost and rely on the communication company's network.The research of logistics and vehicles MIS based on GPS/GIS development and application is described. GPS technology is used to monitor vehicles in the system and GPS information will be sent back to the control center by Wireless Communications (GSM/GPRS).The real-time vehicle information include current location, instantaneous velocity can be shown in GIS clearly. Driver's information, such as speeding records, incorrect route etc can be recorded and saved in database. Transport Protoco1 based on GPRS, HC3000 GPS protoco1 analysis, Object-oriented design methodology, system architecture, key technologies are discussed in the paper.GPRS (General Packet Radio business) is widely used in vehicle control, power meter reading, weather-monitoring and other industries remote data transmission because of its billing flow, high-speed transmission features. This paper compares the TCP(Transport Control Protoco1)with the UDP(User Datagram Protoco1)in several aspects,such as the applicability,the reliability and the expenditure so as to draw the conclusion of which transport protocol is more suitable when applied to the formation management system by GPRS(General Packet Radio Service)net. There are many features, such as high real-time requirements, a small amount of data, and the number of terminals in the vehicles management system. So UDP is better than TCP by comparing two protoco1s.A vehicular GPS coordinate transformation formula and its working procedure are theoretically discussed. Rational simplification is made to the coordinate transformation formula of practical vehicle navigation and real-time monitoring systems. It is shown that the dynamic positioning accuracy of a vehicular GPS system is greatly dependent on the dynamic positioning accuracy of the hardware. Therefore, the simplified formula is highly recommended if the error caused by coordinate transformation do not result in obvious decrease in dynamic positioning accuracy of a GPS system in whole. The coordinate system definition and transformation theory in GIS are discussed, and Key technology developing GIS based on MapX is introduced.The System based on GPS/GIS is introduced. Global position system (GPS), geographic information system (GIS), global system for mobile communications (GPRS), the technique of computer data processing and the technique of data communication were integrated in the system. It could realize to position satellites day and night, display electronic map, implement Real-time vehicle monitoring, play back history records, send monitor and control orders and query inform action. The system was able to return immediately signal of vehicle positioning and alarm inform action, display the run status of mobile vehicle in the form of graphic and data form at, send quickly control order, watch several sites with one vehicle moving, return automatically alarm inform action to the control center,and so on. Experiments show that the system can accomplish intelligent vehicle monitoring, scheduler and management, and satisfy the needs of vehicle position and navigation.