The Exploration And Implementation Of Geographic Information-Sharing Model Based On Service Portal

These years,with the development of network technology and computer technology,and also with the in-depth research and application on geographic information system,which has the service-riented architecture,the providing of geographic information service,which is based on the net and adopts the form of Web-Services,has become the main method of geographic information-sharing,at the same time,going with the outspread of the construction of digital city and digital province in the scope of countrywide,there will be richer and richer geographic information service resources,how these resources can be significantly integrated and applied has become an important subject we faced.Based on the concept of portal,this paper has brought forward the idea of promoting the process of geographic information-sharing more efficaciously,that is,doing research on the geographic information-sharing model based on Service Portal,and building the geographic information service portal as the one-stop entrance of the unified integration and accessing the geographic information service resources in certain area.Based on this,the main research work of this paper can be described as followings:Geographic information web services and sharing is the popular research subject in current GIS field, firstly,this paper has been done some research and summerization systematically on related theories about geographic information service and geographic information-sharing,and at the same time,this paper has also done some research on the theories of portal and its applications in geographic information field.Then,based on the theoretical research work above,this paper has explored and summarized the concept and features of the geographic information-sharing model based on Service Portal,and accordingly,this paper put forward the viewpoint of achieving the integration and sharing of distributed geographic information services through building the geographic information service portal,and this paper has also done some research on the overall structure of this portal. Afer that,this paper has done research on several key technologies,during the process of building the geographic information portal;and has also systematically explored the build model of service portal;and designed the metadata description system,which adapts the features of geographic information service portal;and finally discussed the model of unified description-discovery-integration of geographic information services and the key technology of parsing and integrating these services.Finally,based on these research above,this paper has done the overal architecture design,and then,based on this,this paper has also finished the detailed design for the main parts of this service portal,according to the overal and detailed design,this paper has eventually developped the prototype system by programming,and also concretely verified and implemented the geographic information-sharing model proposed by this paper.