车载GPS道路数据采集与线形参数的计算

Road Data Collection with Kinematic GPS and Calculation of Relevant Parameters

在对我国公路现状进行普及调查的过程中 ,线形数据的采集和参数的计算是一项非常重要的工作。利用动态GPS进行公路线形数据的采集工作 ,通过后处理计算获得公路上各点准确的 3维坐标 ,探讨了利用GPS获得的公路散点数据进行直线、圆曲线参数计算的方法 ,该方法无须给定参数的近似值 ,具有计算简单方便的特点。利用平差后直线和圆曲线的参数计算缓和曲线的参数 ,然后对直线、圆曲线、缓和曲线的连接给出了处理方法。利用在上海市外环线进行采集的车载GPS道路数据 ,采用叙述的方法对试验数据进行了处理 ,说明该方法是可行的。

In the investigation of China present road state, the linear data collection and calculation of relevant parameters are very important. In this paper, kinematic GPS survey has been used in the collection of road linear data. After post data processing, the accurate coordinates of main points of the road are determined. The method of calculation of parameters of lines and circle curves are discussed in detail. This method needs not input approximate value of parameters, and it is simple and easy to use. At first, the parameters of approach curve are calculated by adjusted line parameters and circle curve parameters, then method for dealing with connection of line to circle curve or to approach curve is given. The method in this paper has been testified at out loop road in Shanghai and the results show that this method is practical.