Researches and Application of Internet GIS Integrations Based on Web Service

Internet GIS is one of the most important developing directions of GIS,to build a practical internet GIS system, we must resolve the key technology of multi-source spatial data integration in the internet environ-ment,and spatial meta-data services in the internet environment. Web Service is a new technology in distributed computing domain,and an ideal model to implement inter-operation of different systems. We first made researches on the structure of internet GIS based on Web Service by comparing different computing models and different internet GIS software system structures,and provided a solution to Internet GIS application integration based on standard protocols such as XML, SOAP. Then,we studied the inter-operation of multi-source spatial data in internet environment, compared different multi-source spatial data integration solutions such as spatial data conversation, spatial data directing reading,and provided a new idea in multi-source spatial data integrations based on Web Service. In order to discover spatial data quickly in internet environment,we need a spatial meta-data system,and set up the spatial meta-data service system based on Web Services. The result indicated that spatial meta-data service system should be an essential part in internet GIS system structure. Finally, we introduced a practical example of internet GIS application based on Web Service, Nanjing Digital House Property internet GIS system. It is a mixture structure of GIS system,which was built in B/S part using Web Service technology and effective result was gained.