WebGIS technology can be achieved by J2EE technology. Open source GeoServer was built to meet the J2EE specification GIS platform which has a low-cost, good scalability and deployment flexibility and so on. But while facing a huge map data, if GeoServer was taken as the only Geo Server, it inevitably causes the slow map data transmission rate, even map service data transmission error. This paper describes the application of map cache techology, which included of the establishment of the tiles of the pyram...