The data generated from large-scale and comprehensive geosciences research projects constitute not only an integral part of project achievements but also an important foundation for scientific innovation. To meet the requirements of archiving, management and sharing of complex geo-information resources, it is necessary to establish the online data supporting platform for project management and characteristics of data output. In this paper, the 973 Program project "Major Geological Events in the Earth Surface System during the Cretaceous and Greenhouse Climate Change" was taken as an example, and a data supporting platform to serve this purpose was established based on web services technologies and geographic information technologies. This paper deals with the project data classification and data archiving mechanism. Based on the "data-functionalities-users" view strategy, the authors designed and developed the data services portal to provide data archiving, management and sharing, and implemented integration of WebGIS. The application results indicate that the online data supporting platform plays an ideal supporting role in exerting the sharing value of the multi-source, complex, high-cost geosciences data. As to archiving management of data achievements and completing report representation of similar projects, acertain commonality of the platform framework will show some demonstration significance.%大型综合地学科研项目产生的数据既是项目研究成果的组成部分,又是科技创新的重要基础.面向复杂地学信息资源汇交、管理和共享的需要,有必要建立针对项目自身运行管理和数据产出特色的在线数据支撑平台.本文以973项目“白垩纪地球表层系统重大地质事件与温室气候变化”为例,研究并应用Web Services技术与地理信息技术建立服务于特定项目的数据支撑平台.论文阐述了项目数据的分类方法和数据汇交机制,并基于“数据-功能-用户”视图理念,设计实现了提供数据汇交、管理和共享功能的数据服务门户以及对WebGIS的集成.应用结果表明:在线数据支撑平台对发挥多源、复杂、高成本的地学科研数据共享利用价值具有良好的支撑作用；同时,具有一定通用性的平台框架对同类项目数据成果的归档管理以及验收汇报演示具有示范意义.
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