线性工程勘测定界控制测量坐标系的优选问题研究

在铁路等线性工程控制测量中,由于线路跨度大、高差变化大,其所带来的长度形变也就大。本文分析了长度变形的原因,介绍如何确定高程投影面。结合衢宁铁路勘测定界控制测量,对选择不同的中央子午线、高程投影面进行了详细分析,通过长度变形数据对比,建立适合线性工程需要的坐标系。

An Analysis of Coordinate System Optimization in Linear Engineering Reconnaissance Bordering Control Survey

For linear engineering in engineering survey such as railway,longer span length and large changes of elevation will lead to greater length deformation.This article analyzes the reasons for the length deformation and how to determine elevation surface projection plane.It provides detailed analysis on different choices of central meridian and elevation surface projection plane in Quning Railway reconnaissance bordering control survey,and builds appropriate coordinate system for linear engineering by comparing length deformation data.