Design And Implementation Of WebGIS Based On Flex

WebGIS is the result of combination of internet technology and GIS, with the development of internet and GIS widespread application, the users have a higher demand in the performance and interactive effect, the speed of response as well as the function experience based on the web-page of WebGIS. The RIA (Rich Internet Applications) technology has provided the brand-new Web application solution, brings new opportunity of the development of WebGIS, and realized the more direct-viewing effective application service. Flex is currently one of the most mainstream technologies of RIA, in view of the interactive difference in the application, the speed of response is slow, extendibility is not strong and so on shortcomings of traditional WebGIS, the article proposed the frame design of the WebGIS system based on Flex through the research of Flex technology.The paper first analyzes the Flex technology and the present research situation of WebGIS, in view of the present situation it proposed that the key technologies question and the route and method of studies. Next, it has mainly analyzed the basic construction of Flex rich client side technology, based on this construction, the paper proposed a general framework of WebGIS system, and the database model, the client side and server of the inspection of the pipeline information system is designed and realized. Finally, the thesis completes the inspection of the Shandong Province natural air line's information system, and conforms that Flex technology is operable and has a splendid applied foreground in improving interactivity and expressiveness of WebGIS.