Distributed web geographic information system application based on component

Geographic information system (GIS) has developed at very high speed in recent years. With the development of computer technique, especially distributed component technique, Web GIS has made rapid progress. Based on these existing popular technologies, this paper presents a distributed Web GIS application based on component technology. It presents the basic framework of the proposed system at first, and then discusses the key technology of implementing this system; finally it designs a three-layer Web GIS instance using VC++ ATL based on Geo Beans. The example suggests the proposed design is correct, feasible and valid