Research On Open Interoperable Model Of Distributed Geospatial Information Service And Its Application

With the development of the computer technology, network communication technology and the geospatial information technology, GIS based on network is becoming a popular information tool. More and more Websites offer geospatial data services. However, we still have to face such a reality: It is unable to well communicate and cooperate between tens thousands of Web sites and it is very difficult to visit, deal with distributed magnanimity spatial datum in Web through browser. Because of the limitation of enterprise policy, data safely, and technology, the geospatial resource mostly exist in specific GIS systems or tabletop applications, doing things in their own way and close relatively, thus the detached geospatial information islands are formed. It is difficult to meet the need of sharing geospatial services on Internet. This paper is based on the background mentioned above. The research focuses on how to introduce XML and Web Services technologies into the field of geospatial information, and discusses how to overcome the flaws of current WebGIS with these two technologies, to construct an open and interoperable information service platform.This paper focuses on exploring the new network technology of XML and Web Service, and studying the application in the field of GIS based on the both. XML has obvious advantage in complicated digital coding and exchanging with information; it is an effective way to solve the subject matter that WebGIS faces. Web Service is another brand-new technology to set up distributed systems in the Internet environment. Subsequently, this paper analyses the model of geospatial information web services proposed by OGC. Based on the above research, a 7-tiers Open Interoperable Model of Distributed Geospatial Information Services is introduced in this paper, which can act as an open and elementary information platform.