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中文摘要：
在行程时问参数估计的模型和方法研究的基础上，探讨了地理信息系统（GIS）环境下仿真出租车全球定位系统（GPS）信息的系统实现和关键技术．提出了系统评价的指标，包括信息的准确性、信息的及时性、信息的广泛性和信息成本等，对路网连通性拓扑结构的构建、GPS坐标与城市平面直角坐标的转换模型以及仿真过程中的关键问题给出了解决方法．应用开发的GPS交通仿真系统进行了模拟试验的计算结果表明，提出的模型和方法是可行的和有效的．
英文摘要：
Based on the proposed travel time estimation model and method by using taxi-based global positioning system （GPS）, the key issues of the traffic simulation system on the basis of geographic information system（GIS） are studied. The indicators are first presented to appraise the simulation system, including information accuracy, information betimes, information universality and information cost. The establishment of road network connectivity topology is then discussed; the transformation model between GPS coordinates and city plane rectangular corrdinates is further derived, and the implementation of the simulation model is therefore illustrated. Through the simulation experiments based on the system, the model and method are tested, which proves they are feasible and effective.
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