机构地区: 南京师范大学地理科学学院虚拟地理环境教育部重点实验室
出 处: 《地球信息科学》 2007年第4期74-79,共6页
摘 要: 虚拟地理环境作为一种基于地理研究并提供地学分析的三维可视化的地理空间信息平台,需要解决物理存储分散、数据格式多样的空间信息资源的共享问题。本文研究了虚拟地理环境下的空间信息及其元数据的组织管理方式,定义面向对象思想定义简单的空间信息对象实体,通过对其进行迭代和组合来表达复杂空间信息对象,设计出具有元数据信息的空间信息对象XML描述方案。研究了如何构建集中式的空间信息对象管理与分布式的空间信息服务相结合的空间信息共享体系架构,通过提供对空间信息对象的浏览、分析、操作的Web服务,使得虚拟地理环境在网络中进行资源交换、信息共享、协同工作以及提供决策能得以实现。 As a 3D-visual geospatial information platform based on geographic research and geographic analysis,the virtual geographic environment needs to allow sharing geospatial information resources which have different storage locations and diverse data formats. This paper studies organization and management of the geospatial information and the metadata of the virtual geographical environment. It defines the object-oriented idea to define the simple geospatial information object entity,and expresses the complex spatial information object entity according to the iterative combination. The XML description solution,which describes the geospatial information object and metadata information,is designed. A sharing platform which combines the centralized management of geospatial information object with distributed services of geospatial information is built. Web services of browsing,analyzing,and operating the geospatial information are afforded,which allow for multiple users located in different geographical areas to share distributed geo-information resources,and to implement coordinated work and decision making.