Application Of Distributed Computing Technical In GIS

The rapid development of the computer and Internet technical has greatly promoted GIS transferred from the table to the web, which is based with the distributed computing technical. The emergence of WebGIS presents GIS with more popularity and more wide application fields. It makes that's possible to share the spatial data and operate with each other. At the same time, with the help of the most update computer technical, it presents some new opportunities to express the spatial data.WebGIS is not a simple copy of the table GIS into the web. It's related with the method of transferring data in the web, the safety of the transfer and the method of data acquiring and expressing and some other problems which are never met in the development of the table GIS.Firstly, the paper presents a simple and concise review and comparison of the distributed computing technical. Then, it gives talk with the development of WebGIS currently, which includes the features of the WebGIS' framework, the features of the key WebGIS products and the direction of the development of WebGIS at present. Following is the introduction of some main technical in the realization of WebGIS, it includes the client-side and server-side and the very popular technical, XML(include GML and SVG). This part shows very clearly the roads of the realization of WebGIS. The context of the next part based with DCOM, which realizes a distributed experiment GIS system and presents with detailed realization descriptions. The end of this paper summarizes the technical features of this experiment system and points out where more work should be done in the feature.