摘要： 针对WebGIS显示效率低，而现有瓦片式地图缓存技术又难以有效应用于可编辑WebGIS的问题，设计一种动态缓存策略。该策略从缓存更新的角度对传统瓦片式地图缓存技术进行改进，实现地图缓存的实时动态更新，使网络地图缓存技术能够应用于可编辑WebGIS。通过系统应用实例和性能对比实验，证明该缓存策略能够在不影响系统编辑操作的前提下，提高系统效率，且符合实际行业 需要。
关键词:
可编辑WebGIS,
瓦片式地图缓存,
动态缓存策略
Abstract: Tile caching can reduce WebGIS server load effectively, however, the existed tile caching technology only works well on data that is never or seldom updated. This article presents a dynamic tile caching strategy, which makes tile caching have the ability of updating in real time and can be applied to editable WebGIS. The implementation and experimental results show that editable WebGIS works well with this caching strategy, the response speed of editable WebGIS improves obviously and this caching strategy also meets the actual needs of the trade.
Key words:
editable WebGIS,
tile map caching,
dynamic caching strategy
中图分类号:
黄祥志, 刘南, 刘仁义, 张丰, 李昭. 适用于可编辑WebGIS的动态缓存策略[J]. 计算机工程, 2011, 37(5): 285-287.
HUANG Xiang-Zhi, LIU Na, LIU Ren-Xi, ZHANG Feng, LI Zhao. Dynamic Caching Strategy for Editable WebGIS[J]. Computer Engineering, 2011, 37(5): 285-287.