摘要
在云南怒江高山地区建立等级公路独立坐标系,其地形条件复杂,带状长度较长,高程异常分布不均,致使平面坐标投影变形与GPS高程精度同时满足规范具有一定难度。本文结合怒江地区S213改扩建项目的控制网建设,探讨使用静态GPS布设四等、一级平面控制网以及利用云南省已有似大地水准面插值软件结合高精度GPS/水准采用分段曲线拟合法获取四等GPS高程的方法,并进行精度检验。
Establishing an independent GPS control network for grade highways in Nujiang alpine area is disscussed. Due to the complexity of terrain conditions,long narrow zone,uneven distribution of height anomaly,the distortion of the plane coordinate projection and GPS elevation accuracy are difficult to meet grade highway specifications. This paper describes the control network-building for S213-highway reconstruction in Nujiang area. The static GPS plane control network and the geoid interpolation software in Yunnan province are used,including the high precision GPS / leveling,the piecewise curve fitting method for fourth class GPS elevation,as well as the accuracy inspection.
出处
《工程勘察》
2015年第1期80-84,共5页
Geotechnical Investigation & Surveying
关键词
独立坐标系
公路带状控制网
GPS/水准
四等三角高程
高程异常残差
曲线拟合
independent coordinate system
highway ribbon control network
GPS / leveling
fourth class triangle elevation
height anomaly residual
curve fitting
