数字地球建设中的地理空间信息分层共享模型

A Geospatial Information Layer Sharing Model for Digital Earth

为解决数字地球建设中海量地理空间信息的共建、共享、高效管理和增值使用问题,提出用于数字地球建设的空间信息分层共享模型及其各层共享解决方案.对历史和现有海量数据集层次的共享,结合国际Metadata研究,提出并实现了与WebGIS集成的遵循Z39.50协议的万维网Metadata管理原型系统,并以此为核心实现了空间数据交换中心原型系统.对将来空间数据项层次的数据共享和语义共享,结合OpenGIS标准和XML技术,提出地理空间信息标志语言GeoML(geospatial markup language),研究并设计了GeoML标准草案,实现了基于Web的GeoML原型系统.该成果用于国家九五重点科技攻关项目,取得了较好的攻关效果.

To solve the geospatial information management, sharing and valid use of massive information for Digital Earth, a geospatial information layer sharing model and the solutions of each layer for Digital Earth are advanced in the paper, and the main discussion focuses on data set layer and data item layer. Firstly, combined with the frontier of international geospatial metadata, the Chinese geospatial metadata content standard draft is brought forward for sharing the historical and existing geospatial data on dataset layer. Integrated with WebGIS and based on Z39.50 protocol, geospatial metadata management system for DE construction is designed and achieved. Secondly, taken OpenGIS standard and XML technology into account, geospatial information markup language (GeoML) is put forward to share future geospatial information on data item layer. GeoML standard draft is designed and GeoML prototype based on Web is implemented. The results have greatly promoted the research of the Key Science-Technology Project of the National 慛inth Five-Year-Plan?of China.