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针对当前GIS-T中对于交通事件表达的不足,首先利用交通波理论计算交通事件对路网影响范围的时空变化情况;其次基于线性参考和标准动态分段思想,在标准动态分段中增加时间维属性,通过程序扩展在现有GIS平台上实现时空动态分段方法,并用该方法实现交通事件影响临近路段范围的时空变化可视化表达。结果表明,利用时空动态分段方法可以合理地对交通事件及其影响范围进行时空表达和信息管理,适合进行深入的空间分析并为交通管理部门提供可视化信息和决策支持服务。
Aiming at the shortcomings of current traffic events in GIS-T, firstly, the traffic wave theory is used to calculate the temporal and spatial variation of traffic impact on the road network. Secondly, based on the linear reference and standard dynamic segmentation, time is added in the standard dynamic segmentation Dimensional attribute, and realizes the spatio-temporal dynamic segmentation method on the existing GIS platform through program extension. And this method can be used to visualize the temporal and spatial changes of the adjacent sections affected by traffic accidents. The results show that the spatial and temporal dynamic segmentation method can reasonably make the spatial and temporal expression and information management of traffic accidents and their influence range suitable for in-depth spatial analysis and provide the traffic management department with visual information and decision support services.