Abstract: How can we change spline into orthodox horizontal alignment in highway horizontal alignment design ?The key is the curve graph transformation between the spline and the orthdox horizontal alignment .This paper elaborates the identification method of curve graph of spline curve graph changed into orthodox alignment curve and testifies this method by example .At last we use fminerch method to realize the transformation between them

Key words: curve graph , mountain highway horizontal alignmet , auto identification , transformation

摘要： 公路平面线形设计中，如何将样条似合曲线转化成传统的平面线形，两者曲率图之间的转换是关键。笔者 重点阐述了拟合曲线曲率图转化成传统平面线形曲率图的自动识别方法，并用实例论证其可行性，然后利用得到 的曲率图转化模式采用最小二乘法实现了曲率图和平面线形的转化

关键词: 曲率图, 公路平面线形, 自动识别, 转化