消息调度模型下一种改进的双缓存地图漫游算法  

An improved map roaming algorithm based on messages schedule model

作　　者：冯志红[1] 赵拥军[1] 李光茂 

机构地区：[1]信息工程大学 [2]95847部队

出　　处：《测绘科学》2013年第4期86-90,共5页Science of Surveying and Mapping

摘　　要：在硬件资源有限的嵌入式平台上实现地图平滑漫游是GIS领域的研究热点之一。针对连续地图漫游时出现的显示延迟问题,本文基于消息驱动机制和分块数据存储模型,研究了消息序列化的地图显示调度模型;然后基于消息调度模型并借鉴"贪婪算法"的思想,给出了一种改进的双缓存地图漫游算法。测试结果表明,相对双缓存法,该算法能有效改善地图漫游的平滑度。The real-time map display on embedded platforms with limited hardware resources is one of the research hotspots in GIS field. Considering the problem of display delay caused by successive map operations, this paper focused on the researches of the map display scheduler model with message-serialization; then an improved map roaming method was proposed based on message scheduler model and the Greedy strategy. The test results showed that the new method could improve the smoothness of the map roaming effective- ly compared with the double buffer method.

关 键 词：消息序列化 消息驱动 显示调度模型 双缓存策略 贪婪策略 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TP311[天文地球—测绘科学与技术]