英文文献原文Based on the GPS，GPRS，GIS and Internet vehicle positioningsystemAbstractThis paper introduces an integrated geographic information system (GIS), combined with the application of global positioning system ( GPS ), general packet radio service (GPRS) and Internet vehicle positioning system. For a need to study and management of vehicle positioning of the enterprise, choose a suitable vehicle positioning system is very important. The main feature of the system is the use of open geographic information system platform to access to resources, using the Internet based user interface, realization of vehicle positioning information update. The system consists of GPS based positioning device of the vehicle, communication server, web server, database server and desktop map composition. Positioning device installed in the vehicle interior, through the GPS position to collect real-time information, the information is transmitted to a central database through GPRS. The user can through the Internet in real-time show the location of each vehicle, and then for all vehicles management. Vehicle position and other related information will be displayed in the desktop map generated by an electronic map. This system is the use of information and communication technology combined with each other and form. The sharp rise in fuel prices, this system was successfully used on a companys resources for effective management of great help.Key words: the global positioning system(GPS), general packet radio service(GPRS), vehicle positioning, desktop map, Internet, information communication technology.1 Introduction：This vehicle positioning system the integrated use of modem information technology and communication technology, applied to have more vehicles enterprises, enterprises can use this system for vehicle tracking and management.This system consists of vehicle tracking device, the central server system and Internet. Through this system, users can use their computer control desktop map, and then understand the geographic location of the vehicle and other relevant informatioflThis paper focuses on the design and development of vehicle positioning system in the. However, this system has a lot of other units, including the management of system resources (drivers, vehicles ), and efficient use of (vehicle allocation problem ) and report generation and audit activities such as part of.The system is designed to serve a large fleet of vehicles or complex requirements of the use of enterprise. Workers may need frequent use of short trips, as well as some long-distance travel. Some may visit a short period of time can be determined, and some travel may need to match the coiTesponding daily schedule. Employees may sometimes require extended trips or a parking lot, but the vehicle repair often meet temporary needs- These issues require a more effective vehicle positioning system to solve, in order to meet the above requirements, need a diversification strategy. In order to improve the company overall productivity, must on all vehicle centralized manageme n 匸This paper uses a variety of techniques to achieve this goal. The following example shows: we can take a variety of science and technology are combined to solve a real problem.2 GPS and GPRS definition2.1 GPSGPS English called Global Position System, through a simple translation we will be:n the global positioning satellite system” this results. In the nineteen fifties years, Americans for 30 years, spent $about 30000000000, the construction of such a brilliant and huge system, can be said to be a brilliant history of space flight.Figure 1 GPS navigation satelliteBuilt at the beginning of the global positioning system GPS inspiration was born in meridian instrument satellite navigation system, and radial navigation system cannot display the fixed-point elevation, position accuracy and the positioning time unsatisfactory shortcomings led to the birth of GPS.This system consists of24 satellites, in 11 hours, 58divided into periodic uninterrupted around the earth, as we provide pictures, data. Although some 12000km altitude, can be insight into every corner of the earth. Therefore, at first, this set of equipment is only used in military and civil fields related to important national interests, given its great value to later really used as a civilian, and completely free. Now, GPS is the product of more emerge in an endless stream, GPS mobile phone, car GPS, GPS module. Then, the latitude and longitude of the concept is also moreand more be filed, so we shuttle in the earth will be more easily.2.2 GPRSGPRS Gemeral Packer Radio Service English, Chinese translation for the communication packet radio service. At present the domestic GPRS carrier is China mobile communication, we often send MMS when I need it, say simply, it is a kind of infinite data transmission tool.Specifically, GPRS in the existing GSM system developed out of a new packet d