Study Of Geography Information Service Integration Based On Semantics

With geography information widely applied, it is necessary to support business user on different field to integrate geography information service resource from different source. Geography information service can integrate applications with standards and loose-coupling manner, which has provided a new chance to participate in constructing applications for the end-users on their own initiative. Describing geography information service with ontology is the foundation of geography information service automatic discovery, composition and execution.Supported by project "spatial information management and service system for digital city" from national technology department, geography information service integration oriented to business user is discussed. Geography information service integration framework based on semantics is put forward, semantic describe of procedure of geography information integration on integration framework provided business user integrated environment for geography information service based on semantics.1) Geography information service integration framework is put forward. Main problem of business user on geography information application construction is summarized; concept and character of geography information integration oriented to business user is analyzed. Geography information service integration framework based on semantics is put forward. In framework business component can be looked as basic unit and business template can be used for integration. Single business logic requirement can be formal represented with business component,business component can be connected by geography information service on semantic restriction in framework. Business component and business template can be constructed by field expert, business logic requirement can be formal represented by business user on business template, construction of instance scenario and binding of geography information service will be executed by semantic service matching. Working procedure of geography information service integration oriented to business user is designed in the paper.2) Business component is looked as the way to connect single business requirement of business user and geography information service in the paper. Problems in geography information service integration oriented to business user is discussed, concept of business component is summarized, difference and connection between business component and WEB service is analyzed, function of business component in geography information service integration oriented to business user is summarized. Semantic WEB research is analyzed, semantic description of geography ontology is summarized, concept and semantic description of geography information business component is put forward. Formal representation of geography information service, geography information service user interface and business component are constructed. Construction of geography information service business component is designed, map browse business component is constructed in the paper.3) Business template is designed for large-granularity software reuse. Service integration and geography information service composition is summarized, concept and character of business template is analyzed, construction principal and method of business template is designed, formal representation and applied method of business template is put forward. General logical business requirement of field application will be summarized and business components and relation of business component will be explicit by field expert to construct field business template. Business template is selected by business user according to field, semantic restriction of business component is set up, business requirement is formally represented, schema scenario is constructed.4) Registering and connection method based on semantics of geography information service is put forward. Basic concept and structure for semantic registration is analyzed; Based on OGC service register model, geography information service semantic register model is designed. Semantic service matching method is summarized, procedure of geography information service connecting is put forward.5)GIS service integration system on semantic WEB is tested. Supported by project "spatial information management and service system for digital city" from national technology department, prototype system of GIS service integration is constructed, feasibility and validity of method in the paper is verified.