摘要
空间数据查询效率的优劣决定着三层体系结构空间信息系统的应用效果。空间数据缓存技术是提高空间数据查询效率的有效方法之一。在数据缓存技术逐渐成熟的今天,如何利用数据缓存技术来构建空间数据缓存是目前研究的热点。基于Microsoft新的数据缓存技术,借助常用的格网索引,在客户端和应用服务器端开辟空间数据缓存区,以降低数据的传输量,减少用户的请求响应时间,从而提高空间数据查询效率。在利用版本控制技术实现空间数据缓存的同时,解决客户端、应用服务器和数据库服务器的数据一致性问题,确保空间数据的有效性和可用性。
In the spatial information systems based on the architecture of C/S or B/S, the efficiency of the spatial data querying determines the application of the spatial information system. The technique of spatial data buffering is the efficient method which improve the efficiency of the spatial data querying. It is a focus how to use the data buffering to build the spatial data buffering. In order to improve the efficiency of the spatial data querying, based on the new data buffering technique of Microsoft, the spatial data buffers are built on the clients and the application server which reduce transmitting of spatial data and responding of user query. The technique of version control which ensure the efficiency and availability of spatial data is used to build spatial data buffer and solve the coordination among the clients, the application server and the database server.
出处
《海洋测绘》
2009年第3期34-37,共4页
Hydrographic Surveying and Charting
