摘要
针对高海拔低纬度地区,GNSS控制网存在投影变形的问题,如何选取合理的投影面和投影带建立坐标系,从而控制投影变形小于2.5 cm/km是问题的关键。文章从理论上分析长度变形的影响规律,提出合理的解决方法,通过工程案例验证该方法在实际工程中应用的可行性。
Aiming at the problem of projection deformation in GNSS control network in high altitude and low latitude areas,choosing a reasonable projection plane and projection zone to establish a coordinate system,so as to control the projection deformation less than 2.5 cm/km is the key to the problem.This paper theoretically analyzes the influence law of length deformation,puts forward a reasonable solution,and verifies the feasibility of this method in practical engineering through engineering cases.
作者
常乐
张万栋
刘翠芝
CHANG Le;ZHANG Wandong;LIU Cuizhi(School of Civil Engineering,Shenyang Institute of Urban Construction University,Shenyang 110167,China;China Water Resources Beifang Investigation,Design and Research Co.,Ltd.,Tianjin 300222,China;School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《测绘与空间地理信息》
2024年第10期71-74,82,共5页
Geomatics & Spatial Information Technology
基金
辽宁省教育厅基本科研项目——基于城市地理信息共享的CGCS2000坐标系转换研究(JYTMS20231545)
沈阳城市建设学院科学研究发展基金项目(XKY202312)资助。
关键词
GNSS控制网
投影变形
中央子午线
抵偿高程面
GNSS control network
projection deformation
central meridian
compensating level surface
