基于元数据的复杂地学综合数据共享管理

地学数据以长时间、大尺度、大规模为特征，包括空间数据和非空间数据(属性数据)。地学数据无论从其来源或其结构来说，都是非常复杂的，在地学数据的共享中，存在以下的问题。首先，长期以来人们对科学数据问题重要性的认识不足；其二，管理手段十分落后．基于元数据的复杂地学数据共享系统，可以管理不同类型、不同来源和不同格式的数据．实现了对异构数据源的透明访问，系统具有可扩展性和开放性，实现了数据源的自治．共享系统采用4层体系结构，为复杂地学的管理和信息化提供了技术方法。

The Complex Geo-integrated Data Sharing System Based on Metadata

It is well-known that geology data are very complicated. They are characterized by long time, large yardstick and great extent. In their sharing by common there have been two problems:one is that people has not paid enough attention to them and their importance, another is that the management means of the data are still quite backwards. In this paper, the complex geo-integrated data sharing system is introduced. The system is established based on metadata and enables us manage well data of various types, sources and different forms. In this system people visit transparently data sources of different constructions. The system is expansive, opened and data source autonomous. The sharing platform has four frames which provide techniques and methods to geo-data management and informationization.