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中文摘要：
车辆定位和监控应用越来越多,但是大批车辆显示存在速度慢、车辆覆盖率低等问题。针对以上问题,提出了基于层次网格索引的大批监控车辆显示模型,为车辆建立多层网格索引,结合地图显示比例尺动态聚合重叠显示的车辆,实现了车辆监控的全覆盖,降低了数据传输量,提高了车辆显示速度。最后通过广东省重点车辆监控系统实现了该模型,验证了模型的有效性。
英文摘要：
Vehicle′s positioning and monitoring are more and more popular.However,mass vehicles′ presentation is slow and their coverage rate is smaller than enough.To deal with the issues mentioned above,a mass monitored vehicles′ presentation model is provided based on multilayer grid,and a multilayer grid index is established,to aggregates overlapping vehicles dynamically combined with map scale.This method makes full overlay of monitored vehicles,reduces data transmission and improves the speed of vehicles′ presentation.At last,this model is verified through the application of Key Vehicles Monitoring System in Guangdong Province.
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