基于超级P2P的网格GIS体系结构及其支撑环境

Super P2P-based grid GIS architecture and its supporting environment

Grid_GIS是一个采用SOA思想,支持动态多功能集成的网格GIS系统.系统采用一种超级P2P的网格体系结构,实现GIS资源的分布式存储、查询处理和动态功能集成;根据领域本体知识和推理机制,实现基于语义的智能查询;基于文本相似性,可分领域注册GIS资源,实现资源的快速发现;根据系统的状态和任务之间的通信关系,改进成本约束的自适应调度算法,实现系统的动态调度和负载平衡;采用WS-security扩展实现网格的安全性,既可以保证网格的安全又可以实现与其他平台的兼容性.基于LAN做了一个数据共享和转换的试验系统,验证了系统的可行性和有效性.

Grid_GIS is an SOA-based grid GIS system for data and function sharing in multiple application domains. Grid_GIS adopts a super P2P architecture to realize the distributed storage, query processing and dynamic functional integration. According to domain ontology, knowledge and reasoning rules were used to support the semantics-based intelligent query. According to the text similarity, the GIS resources were registered to the corresponding domains for rapid discovery of GIS resources. According to the system state and the communication between tasks, cost constraints adaptive scheduling algorithm was adopted to realize system dynamic scheduling and loading balance. The WS-security expansion was utilized to realize the grid security, guarantee the grid security and realize other platform compatibilities. A data sharing and transformation experimental system was made based on LAN and the system＇s feasibility and effectiveness.