The Research Of Spatial Information Share And Service Mechanisms In The Distributed And Heterogeneous Data Environment

High efficiency ability to store, organize and publish data is urgent needed in the country digital production. The data produced during the process of digital province construction are heterogeneous, mass and distributed stored. The centralized organization and application of information is not matching the requirement of information distributed store, organization and maintenance. So, it is needed to setup a new form information organization and application system with the ability to integrate the distributed and heterogeneous data, further more, to provide information share and information service.The quick development of computer technology has made it technologically possible to provide information share and service. Nowadays it is well recognized to get, publish, share and serve information by Internet. Based on the synthetic analysis of the status and the evolution trend of computer technology, generally guided by the demands of the information location, share, integration and service of the digital province and digital industry, this thesis presents the essential mechanisms of information share and service to integrate across-field, across-organization, distributed, heterogeneous information. The main work and innovation aiming at key mechanisms research goes as follows:1. According to the demands of designing a information share and service system, the focuses placed at the researching and comparing the technology of how to implement the cooperating work between the distributed computers and the business logic, how to organize the heterogeneous data in a consistent model, how to publish and share data, how to publish and gain services.2. Aiming at setup a system with strong functions, clear logical, good expansibility and well maintenance, system architecture is organized as five layers: client layer, portal service layer, application service layer, data service layer and data storage layer.3. Proposing the model of "Virtual Data Center" to store and manager distributed data. Main work is placed at how to satisfy the demands of storing and organizing multi-layer, multi-type, mass and distributed information.4. Designing the scheme to integrate distributed and heterogeneous data sources based on the XML.The XML have been a criterion of data exchanging between applications, which is a markup language enjoy good expansibility5. Design the Web Services manager system, Web Services exchanging platform and Web Services providing platform in detail. Implement the release and gain of information services in the Internet.6. In order to verify the above theoretical models and architecture, the author has undertaken three case studies: "Important Industry 3S Application Demonstration-region", "Digital Forestry" and "the Agent of Spatial Analysis Services ".