山地高速公路测绘中独立坐标系统的选建研究

Study on the Construction of Independent Coordinate System in Surveying and Mapping of Mountainous Expressway

通过实例计算,论述了在山区高速公路测绘中建立独立坐标系的投影带及投影面选择方法,得出独立坐标的建立应结合测区所处的地理位置,合理选择投影带和投影面,并且在高程落差大的测区可选择多个投影面进行计算的结论,使工程平面控制网控制点之间的反算边长与实地量测边长基本一致,以满足山区高速公路控制测量作业要求。

In this paper,through the examples,discusses the establishment of independent coordinate system with projection and projection in the mountainous area highway surveying surface selection method,the establishment of the independent coordinate system should be combined with the measured area location,reasonable choice of projection zone and projection plane,and the elevation drop test area can choose more than one projection plane is calculated conclusion the plane control points of the inverse length and field measurement length are basically the same,in order to meet the requirements of surveying control of Expressway in mountainous area.