济南轨道交通S1线坐标系统建立的实践与研究

Practice and Research on the Establishment of Jinan S1 Line Coordinate System Based on Urban Coordinate System

针对采用原有城市平面坐标系济南轨道交通S1线综合投影变形超限的情况,通过变换中央子午线,求取新参数,确定坐标原点,建立新的坐标系,同时做好与已有线路的衔接。结果表明,在新的坐标系下,长度综合投影变形满足规范要求,控制点精度良好,与轨道交通既有线路兼容性好。

According to the situation that the comprehensive projection deformation of Jinan Metro S1 line using the original city plane coordinate system exceeds the limit,the central meridian is transformed to obtain new parameters,the coordinate origin is determined,the new coordinate system is established,and the connection with the existing line is completed. The results show that under the new coordinate system,the length comprehensive projection deformation meets the specification requirements,the control point accuracy is good,and the compatibility with existing lines of rail transit is good.