The Svg In Webgis Applications

SVG is a vector graphic standard based on XML developed by W3C, It has been widely used in the field of vector map on GIS. The paper analyses the method of graphic expression and interaction in SVG, studies the technology of map generation and dynamical real-time data publication, designs the Vehicle Monitoring System based on B/S framework with SVG. Monitor Server is the main part of the system, it has four parts: Task Manager, Map Generator, Application Processor and Real-Time Processor. They work well together and implement the functions of the Vehicle Monitoring System. The system has completed many functions, such as vehicle's tracking, map's browsing, vehicle's querying, etc. It reaches a better level in reality.In the research and development of the Vehicle Monitoring System, we have solved how to store and manage the geospatial data. We use GML to transfer geographic information and use SVG to view the geographic information, find a method of transformation from GML to SVG. We combine SVG and data publication technology, a model of dynamical real-time data publication based on SVG is presented. Finally, we implement the technology of vehicle's dynamical tracking.