Study On Register Center Cluster Construction For Grid Geospatial Information Service

Grid geographic information service (GGIS) is the extension of geographic information service under grid environment, which upgrades the share and cooperation for geographic information resource. The purpose of GGIS is to realize the integration, share, administration and cooperation of whole resources (computing resources, storage resources, communication resources, GIS software resources, GIS data resources, spatial knowledge resources, etc.) about spatial information under grid environment. But the dynamic, various and regionally independent characters of GGIS bring great difficulty to service administration, which becomes the bottleneck of GGIS application. Service register center is the core component of grid system, which supplies effective platform for share and cooperation of services. To fit the mass and complicated character of grid, distributed register center is usually used to administer service resources in large-scale grid application.The paper discusses the theory and approach of register center cluster for grid geospatial information service. Main works and innovations include:(1) On the basic of comparing with the technologies of current register center for grid geospatial information service, the main application needs and research contents were brought forward definitely.(2) This paper analyzed the relationship and difference of grid service and web service in the three aspects of development, function and connotation, and proposed the conception and connotation of generalized and specialized grid geospatial information service.(3) On the basic of analyzing the character and shortage of current geospatial information service classification system, grid geospatial information service classification system considering application was proposed and built.(4) Based on the conception and dividing method of static and dynamic virtual organization of geospatial information service, the conception of RCC-GGIS was proposed, and then RCC-GGIS frame and catalog database architecture were designed.(5) The process of service registration and publication was discussed, and multi-QoS model of geographical information service based on user preference was built. Then local search and global search methods were studied about grid geographic information service search.(6) The life cycle management problem about grid geographic information service was studied, and user management and load-balance and fault-tolerant in RCC-GGIS were realized.(7) The prototype system of RCC-GGIS was built, and preliminary application achieved in the state 863 important demonstration application system.