“公路”1959年第7期发表了郑成谋同志在切线任意点上测设圆曲线的方法,唯须用三角法进行计算,比较麻烦,现介绍一种比较简单的用极坐标的计算方法。如图所示,C 为切线上任意点,如在 C点测设圆曲线上 A 点须算出夹角 0 和距离 SoA 点的坐标(x_n,y_n)可以从曲线表中查出,S 值可以用公式求得。 “Highway” No. 7 of 1959 published Comrade Zheng Chengmou at any point tangent set measuring circular curve method, the only need to use trigonometry calculation, more trouble, is now introduced a relatively simple method of using polar coordinates. As shown in the figure, C is an arbitrary point on the tangent. For example, if the point A on the circular curve is measured at point C, the coordinates (x_n, y_n) of the included angle 0 and the distance SoA point can be found from the curve table. Calculated using the formula.