Research and Realization of RIA WebGIS Based on Flex

As a new method of WebGIS developing, the RIA technology has the good development foreground. According to the characteristic of Flex and RIA, we analyzed the architecture of RIA WebGIS based on Flex. In order to improve the efficiency of the system, we introduced the tile and double cache technology, vector and raster integrated map service. At last, a solution was presented and a certain company WebGIS system was developed. The results demonstrate that developing WebGIS by Flex technology is an ideal method.