We analyze the deficiencies of current application systems, and discuss the key requirements of distributed Geographie Information serviee (GIS), We construct the distributed GIS on grid platform. Considering the fl...We analyze the deficiencies of current application systems, and discuss the key requirements of distributed Geographie Information serviee (GIS), We construct the distributed GIS on grid platform. Considering the flexibility and efficiency, we integrate the mobile agent technology into the system. We propose a new prototype system, the Geographic Information Grid System (GIGS) based on mobile agent. This system has flexible services and high performance, and improves the sharing of distributed resources. The service strategy of the system and the examples are also presented.展开更多
The Internet technology has already changed the Information Society in profound ways, and will continue to do so. Nowadays many people foresee that there is a similar trajectory for the next generation of Internet - G...The Internet technology has already changed the Information Society in profound ways, and will continue to do so. Nowadays many people foresee that there is a similar trajectory for the next generation of Internet - Grid Technology. As an emerging computational and networking infrastructure, Grid Computing is designed to provide pervasive, uniform and reliable access to data, computational and human resources distributed in a dynamic, heterogeneous environment. On the other hand, the development of Geographic Information System (GIS) has been highly influenced by the evolution of information technology such as the Internet, telecommunications, software and various types of computing technology. In particular, in the distributed GIS domain, the development However, due to the closed and centralized has made significant impact in the past decade. legacy of the architecture and the lack of interoperability, modularity, and flexibility, current distributed GIS still cannot fully accommodate the distributed, dynamic, heterogeneous and speedy development in network and computing environments. Hence, the development of a high performance distributed GIS system is still a challenging task. So, the development of Grid computing technology undoubtedly provides a unique opportunity for distributed GIS, and a Grid Computing based GIS paradigm becomes inevitable. This paper proposes a new computing platform based distributed GIS framework - the Grid Geographic Information System (G^2IS).展开更多
随着GIS的普及和深化,空间信息的大数据量、高复杂性和难共享的问题对其研究和应用提出了新的挑战。空间信息网格 (Spatial Information Grid,SIG)作为创新性的网络空间信息基础设施和技术体系,为解决这些问题提供了新的契机。本文在给...随着GIS的普及和深化,空间信息的大数据量、高复杂性和难共享的问题对其研究和应用提出了新的挑战。空间信息网格 (Spatial Information Grid,SIG)作为创新性的网络空间信息基础设施和技术体系,为解决这些问题提供了新的契机。本文在给出SIG基本定义和基本特征的基础上,就如何实现基于SIG的矿产资源评价进行了有益的探索和实践,并取得了很好的效果,为矿产资源评价提供了新的方法和思路。展开更多
基于空间信息网格SIG框架的上海城市空间信息应用服务系统中城市空间特征、绿化、环保、水系、土地、道路网络等各类城市空间信息资源分布在网络的不同节点上;建立了集中的元数据库提供相关数据的描述信息;以分布在不同节点上的GIS Web ...基于空间信息网格SIG框架的上海城市空间信息应用服务系统中城市空间特征、绿化、环保、水系、土地、道路网络等各类城市空间信息资源分布在网络的不同节点上;建立了集中的元数据库提供相关数据的描述信息;以分布在不同节点上的GIS Web Service提供空间数据处理服务。平台以门户网站的方式提供元数据检索,利用检索结果获取分布式的各类空间信息数据资源;提供空间数据处理网络应用程序,调用GIS Web Service,提供格式转换、坐标转换、地图综合、空间分析等空间数据处理功能;提供GIS Web Service的搜索和注册。此平台已经在上海公务网中实际运行。展开更多
空间信息数据量大、处理复杂、难以共享的问题对其研究和应用提出了挑战。空间信息网格(Spatial Information Grid,SIG)作为创新性的网络空间信息基础设施和技术体系,集成并拓展信息网格、空间信息系统、Web服务等前沿技术,以"服务...空间信息数据量大、处理复杂、难以共享的问题对其研究和应用提出了挑战。空间信息网格(Spatial Information Grid,SIG)作为创新性的网络空间信息基础设施和技术体系,集成并拓展信息网格、空间信息系统、Web服务等前沿技术,以"服务"为中心,实现一体化、智能化的空间信息获取、存储、组织、分发、分析处理、集成与应用,实现基于网络的空间信息资源共享与空间信息服务。展开更多
由于空间数据类型、管理机构的多样性,以及构建数据服务系统的历史渐进性,不同空间数据网格平台之间的数据互操作能力难以提高.基于代理的数据管理模型,可以在最大程度地保护数据源独立运行性的前提下,屏蔽复杂数据系统间的异构特征.文...由于空间数据类型、管理机构的多样性,以及构建数据服务系统的历史渐进性,不同空间数据网格平台之间的数据互操作能力难以提高.基于代理的数据管理模型,可以在最大程度地保护数据源独立运行性的前提下,屏蔽复杂数据系统间的异构特征.文中探讨利用存储资源代理技术(storage resource broker,SRB),实现异构数据平台之间一体化的数据检索和访问.描述了空间信息网格(spatial information grid,SIG)环境中,基于SRB的异构数据网格互操作接口设计和信息通信流程,并对实验结果进行了分析.展开更多
基金Supported by the National Technology Research and De-velopment Programof China (863 Program,2002AA135340) and the Na-tional Key Basic Research and Development Program ( 973 Program,2004CB318206)
文摘We analyze the deficiencies of current application systems, and discuss the key requirements of distributed Geographie Information serviee (GIS), We construct the distributed GIS on grid platform. Considering the flexibility and efficiency, we integrate the mobile agent technology into the system. We propose a new prototype system, the Geographic Information Grid System (GIGS) based on mobile agent. This system has flexible services and high performance, and improves the sharing of distributed resources. The service strategy of the system and the examples are also presented.
文摘The Internet technology has already changed the Information Society in profound ways, and will continue to do so. Nowadays many people foresee that there is a similar trajectory for the next generation of Internet - Grid Technology. As an emerging computational and networking infrastructure, Grid Computing is designed to provide pervasive, uniform and reliable access to data, computational and human resources distributed in a dynamic, heterogeneous environment. On the other hand, the development of Geographic Information System (GIS) has been highly influenced by the evolution of information technology such as the Internet, telecommunications, software and various types of computing technology. In particular, in the distributed GIS domain, the development However, due to the closed and centralized has made significant impact in the past decade. legacy of the architecture and the lack of interoperability, modularity, and flexibility, current distributed GIS still cannot fully accommodate the distributed, dynamic, heterogeneous and speedy development in network and computing environments. Hence, the development of a high performance distributed GIS system is still a challenging task. So, the development of Grid computing technology undoubtedly provides a unique opportunity for distributed GIS, and a Grid Computing based GIS paradigm becomes inevitable. This paper proposes a new computing platform based distributed GIS framework - the Grid Geographic Information System (G^2IS).
文摘随着GIS的普及和深化,空间信息的大数据量、高复杂性和难共享的问题对其研究和应用提出了新的挑战。空间信息网格 (Spatial Information Grid,SIG)作为创新性的网络空间信息基础设施和技术体系,为解决这些问题提供了新的契机。本文在给出SIG基本定义和基本特征的基础上,就如何实现基于SIG的矿产资源评价进行了有益的探索和实践,并取得了很好的效果,为矿产资源评价提供了新的方法和思路。
文摘基于空间信息网格SIG框架的上海城市空间信息应用服务系统中城市空间特征、绿化、环保、水系、土地、道路网络等各类城市空间信息资源分布在网络的不同节点上;建立了集中的元数据库提供相关数据的描述信息;以分布在不同节点上的GIS Web Service提供空间数据处理服务。平台以门户网站的方式提供元数据检索,利用检索结果获取分布式的各类空间信息数据资源;提供空间数据处理网络应用程序,调用GIS Web Service,提供格式转换、坐标转换、地图综合、空间分析等空间数据处理功能;提供GIS Web Service的搜索和注册。此平台已经在上海公务网中实际运行。
文摘空间信息数据量大、处理复杂、难以共享的问题对其研究和应用提出了挑战。空间信息网格(Spatial Information Grid,SIG)作为创新性的网络空间信息基础设施和技术体系,集成并拓展信息网格、空间信息系统、Web服务等前沿技术,以"服务"为中心,实现一体化、智能化的空间信息获取、存储、组织、分发、分析处理、集成与应用,实现基于网络的空间信息资源共享与空间信息服务。
文摘由于空间数据类型、管理机构的多样性,以及构建数据服务系统的历史渐进性,不同空间数据网格平台之间的数据互操作能力难以提高.基于代理的数据管理模型,可以在最大程度地保护数据源独立运行性的前提下,屏蔽复杂数据系统间的异构特征.文中探讨利用存储资源代理技术(storage resource broker,SRB),实现异构数据平台之间一体化的数据检索和访问.描述了空间信息网格(spatial information grid,SIG)环境中,基于SRB的异构数据网格互操作接口设计和信息通信流程,并对实验结果进行了分析.