浅析大比例尺地形测量坐标系的选择

Choice of Coordinate System for Topographic Survey with Large Scale

大比例尺地形测量通常会遇到坐标系统选择的问题,测量规范中要求坐标系的选择以投影长度变形值不大于2.5cm/km为原则。通过对苏通大桥控制测量选择多种坐标系得出的成果进行比较,简单分析了地形测量如何选择坐标系以满足测量精度要求。

Large-scale topographic survey often encountered coordinate system option. As the principle surveying norms require the coordinate system to choose the length of the projection deformation is not longer than 2.5 cm/km. Through comparing the results of many coordinate system in the control survey of the Sutong Bridge project, this article make a simple analysis of how to choose the terrain measurement coordinate system to meet the accuracy requirements.