对地学数据进行GIS统一管理与检索分析,实现数据的空间化显示和数据挖掘,是数据共享网建设的重要发展方向。本文以地球系统科学数据共享网中的气候-海面变化数据集为例,在气候-海面变化数据模型研究基础上,进行了相关数据库的统一规划、设计与管理;同时基于.NET、ArcIMS开发平台,利用ASP.NET、ADO.NET等工具开发了气候-海面变化数据检索系统,用户可在统一平台下实现基本数据、专题、空间和文献的单一检索或多角度集成检索。此外,通过GIS初步实现了一些数据分析和数据挖掘功能,以及文献空间化及相关地学数据的可视化。本系统初步实现了面向用户服务的统一存储管理、发布、检索与共享,是将科学数据中心由单纯的数据下载中心向数据服务中心转变的一次有益尝试。
With the implementations of global-change and other major science programs, there is an urgent need to collect and share multi-source heterogeneous mass of data at regional and even global scale systematically. Traditional data centers only provide downloading service, which significantly lacks services to diversified needs of users. Therefore, it is one of the main directions of data sharing network development to meet the demand for users and achieve spatially displaying and data mining based on GIS technology. Taking the construction of climate and sea-level change dataset in the Geodata-sharing network as an example, aiming at the management and retrieval of geo-scientific datasets, based on research of climate and sea-level change data model, in this article we carried out unified planning, designing and management of the related databases. Furthermore, ASP.NET, ADO. NET system development environment are used to build the retrieval system of climate and sea-level changes based on .NET and ArcIMS technologies. Users in a unified platform can achieve single retrieval such as basic data, thematic themes, spatial contents and literature searches or multi-angle integrated retrieval. Simultaneously, with the application of GIS, a number of data analysis and data mining functions are achieved preliminarily and the literature and related geodata visualization are also achieved. The user-oriented services to unified storage management, publication, retrieval and sharing are accomplished preliminarily, which is a valuable attempt to science data centers by converting the simplex data downloading centers to the multi-functional data service centers.
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