西宁市独立坐标系的建立与实现  

The Establishment and Realization of Xining Local Coordinate System

作　　者：马锦山 姚永顺 王伟 尹继鑫 陈华[3] Ma Jinshan;Yao Yongshun;Wang Wei;Yin Jixing;Chen Hua(Xining Land Survey and Planning Research Institute,Xining 810000,China;Xining Surveying and Mapping Institute,Xining 810000,China;School of Geodsy and Geomatics,Wuhan University,Wuhan 430079,China)

机构地区：[1]西宁市国土勘测规划研究院,青海西宁810000 [2]西宁市测绘院,青海西宁810000 [3]武汉大学测绘学院,湖北武汉430079

出　　处：《城市勘测》2022年第3期87-89,96,共4页Urban Geotechnical Investigation & Surveying

摘　　要：满足投影变形要求的独立坐标系是城市工程建设的重要基础。由于西宁市地势复杂,平均海拔超2000 m,标准的3°和6°高斯平面坐标系不能满足西宁市区域对投影变形的要求,不能直接用于工程建设。本文基于数字地形高程模型和高斯投影变形基本理论,通过多组数据分析、对比,确定了合适的高程抵偿面和中央子午线,建立了西宁市独立坐标系。成果能为西宁市的工程建设提供技术支撑。The local coordinate system is required for kinds of engineering projects,and it has been an important infrastructure of a city.Due to the hard terrain and the high altitude of Xining,the national standard coordinate system can not be used directly for engineering construction in Xining.Therefore,this paper introduced the basic theory of Gauss projection deformation first,and then,the methods for determining an appropriate surface and central meridian is provided.Finally,experiments are carried out to determine the local coordinate system for Xining.The results can support the construction of engineering in Xining.

关 键 词：西宁市 长度变形 抵偿高程面 独立坐标系 

分 类 号：P226.3[天文地球—大地测量学与测量工程]