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《Journal of Geo-Information Science》 2009-01
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Research on Earth System Scientific Data Sharing Platform Based on SOA

ZHU Yunqiang FENG Min SONG Jia LIU Runda (Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China)  
In order to integrate distributed and heterogeneous earth system scientific data resources and provide one-stop data sharing services for different users,a distributed data sharing platform is needed urgently in China. In this study,we analyzed interoperability requirements of the distributed earth system scientific data sharing plat- form(ESSDSP)in the first place.After compared with several architectures and technologies of distributed inter- operability,we chose SOA(service-oriented architecture)as the architecture of ESSDSP(hereafter called SOA4GS,SOA for Geo-data sharing).The basic principle of SOA4GS was to abstract a series of web services from the whole data sharing activities which included information synchronization service of data centers,distributed metadata synchronization management service and multi-resource data access service.Through deploying these web services in different data sharing nodes,the software can easily implement the interoperability among them.Finally we introduced the design,implementation and deployment of these web services in detail.SOA4GS has the following characteristics:(1)Distributed nodes with uniform logic ESSDSP are comprised of many centers which are deployed in different organizations at different locations.They have the uniform business logic to ensure they can communicate each other by web services.(2)With open and extensible architecture based on SOA,ESSDSP is an incompact architecture.So other systems based on web can be easily integrated into the platform after little function model revision for compliance with the interface of web services,while,on the other hand,systems such as e-government and e-commerce can use data sharing functions by calling web services to share the data provided by the platform.(3)Easy to use Web service platform is a web software module.Its client code can be created automatically from the web service' address by using some development tools such as Eclipse,JBuilder.So users can easily call the platform's web services or revise their system's functions.In practice,ESSDSP has been used in Earth System Scientific Data Sharing Network,one of National Infrastructure and Facility Development Environment Building for Science and Technology Industries Program of China.It comprises one main center,one authentication center and 13 sub-centers.So far,it has integrated 10.23 T Byte data resources and 17 T Byte data resources have been downloaded by 34,597 users.
【Fund】: 国家科技基础条件平台建设项目(2005DKA32300);; 国家863项目(2006AA01A120);; 地理科学与资源研究所知识创新工程新进所青年人才领域前沿项目:基于地理本体的地学元数据智能搜索研究共同资助。
【CateGory Index】: TP311.52
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