地理学报 ›› 2002, Vol. 57 ›› Issue (7s): 27-31.doi: 10.11821/xb20027s004

• 理论与方法 • 上一篇    下一篇

国家资源与环境数据库的元数据库系统建设

曹彦荣,何建邦,李新通,毕建涛   

  1. 中国科学院地理科学与资源研究资源与环境信息系统国家重点实验室, 北京 100101
  • 收稿日期:2002-09-06 修回日期:2002-10-09 出版日期:2002-12-25 发布日期:2002-12-25
  • 作者简介:曹彦荣 (1974-), 男, 甘肃临洮人, 博士研究生, 主要从事空间元数据, 地理信息服务研究。E-mail: caoyr@lreis.ac.cn
  • 基金资助:

    中科院知识创新工程项目 (KZCX2-308-02);“十五”国家攻关课题 (2001BA608B-01)

Construction of National Resource and Environment Spatial Database

CAO Yanrong, LI Xintong, WU Hongqiao, BI Jiantao, HE Jianbang   

  1. State Key Laboratory of Resources and Environment Information System, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
  • Received:2002-09-06 Revised:2002-10-09 Online:2002-12-25 Published:2002-12-25
  • Supported by:

    Knowledge Innovation Project of CAS, No.KZCX2-308-02; National Key Project of the Tenth-Five Year Plan, No.2001BA608B-01

摘要:

概述了国家资源与环境数据库元数据标准的制定方案与元数据管理系统的开发,并着重就元数据建设中出现的若干问题进行初步探讨。在建设元数据库过程中,元数据本身的数据质量的不高,降低了元数据的意义,并相应降低了数据的可获取程度,本文提出了把多级可扩展元数据的模型与分类元数据相结合用以提高元数据质量。如何更有效地利用元数据进行科学研究,也是一个重要研究课题,本文提出了元数据由被动服务转向主动服务的扩大服务范围的方法。

关键词: 元数据, 元数据标准, 元数据管理系统, 数据质量, 主动服务

Abstract:

The paper examines how to establish metadata standard and metadata management system of National Resource and Environment Spatial Database. It also discusses some issues concerning the construction of metadata database of National Resource and Environment Database. In the construction, low quality of metadata results in depression of metadata's function and acquirability of the datum. Additionally, this paper gives a new direction of metadata-base research. According to multi-layer metadata model, it combines extensible metadata model with inhomogeneous metadata to improve metadata quality. This paper also puts forward a method that can make metadata-based service convert from passive mode to initiative mode.

Key words: metadata, metadata standards, metadata management system, data quality, initiative service