基于双缓存机制的分布式WebGIS数据集成访问策略

A Distributed WebGIS Data Integration Access Strategy Based on the Dual-Cache Mechanism

随着因特网的迅猛发展,分布式WebGIS的重要性日益增加。如何提高分布式WebGIS的查询效率是其中的重要课题。针对此问题,本文提出了一种基于双缓存机制的分布式空间数据集成访问策略,给出了双缓存机制的控制数据结构,讨论了空间数据集成访问策略和针对WebGIS数据特点的缓存替换策略。实验表明,双缓存机制能够有效地提高分布式WebGIS的查询速度。

The fast development of the Internet makes the distributed WebGIS more and more important in the application area. An efficient method to improve the distributed query for WebGIS is proposed. This paper gives an integrated strategy to access distributed spatial data sets based on the dual-cache mechanism, and presents the corresponding data structure. The integrated query strategy and the replacement policy are discussed. Experimental results show that great performance optimization can be achieved.