GIS环境下缓和曲线绘制方法研究.The GIS environment study on drawing method of transition curve.-The GIS environment study on drawing method of transition curve.

工程测量学 缓和曲线的vb代码：已知某曲线a,R,L,ZH点的里程，计算三点的坐标-Engineering surveying school transition curve vb code: known curve a, R, L, EN point of mileage, calculate the three-point coordinates