Abstract: Using a server and client mixed construction model, WEBGIS is a combination of network technology and GIS technology product. The vector map pre-rendered is based on the server to draw a rasterized tile map currently, and then the browser obtains and displays it. This method is unable to meet the vector map dynamic mapping on the browser, vector map promise zoom and other functions of the demand. By studying for the display control frame of vector map, the rendering of vector objects and annotations along with symbolic library and map symbolization researched, the HTML5 technology is used to build a browser-based vector data visualization system prototype. This system is verified in key technologies of the vector data rendering and map interactive, and meet the user’s growing needs of RIA (rich Internet application).

Key words: frame, draw, symbolization, HTML5, interactive