线路中心线

水平地基的变形大致对称于线路中心线，斜坡地基的变形集中在下坡一侧边坡下；

The deformation of level foundation is generally symmetric of road central line and the deformation of slope foundation is mainly concentrated on the border side of the declivity .

根据公路、铁路选线设计中裁图、折图的要求，以线路中心线为依据确定裁图边界并获取其相应数据，实现快速裁图、擦图及折图。

By setting trimming edge according to route center line based on requirement of the high way and railway route-choosing design , the quick trimming , rubbing and folding can be realized .

由于利用ARX的库函数结合CAD图形对线路交点坐标进行计算需要绘制线路中心线，为了系统的完整性，本系统按照规范对平面图进行了绘制。

The system draws plan graphic according to code , for the reason that it is required to draw line centerlines , when we calculate lines intersecting point coordinate using library function of ARX with graphics of CAD , both for the sake of system integrity .