根据控制点和道路中心线的坐标值，利用距离加权平均法内插每个点的高程值，最终生成有Z值的道路边线。-According to the coordinates of control points and road centerlines, using the interpolated elevation value of each point from the weighted average method, the resulting Z value of the road edge.

最大公因数使用辗转相除法来求，最小公倍数则由这个公式来求： GCD * LCM = 两数乘积 -The greatest common divisor using Euclidean algorithm to seek, to find the least common multiple by this formula: GCD* LCM = product of two numbers