GPS桥梁网的坐标转换

GPS Datum Transformation Technology for Bridge Plane Control Networks

针对ＧＰＳ桥梁控制网的特点，提出使用施工椭球作为高斯投影计算的参考面，它克服了测区似大地水准面相对于参考椭球面倾斜的缺陷，提高了坐标转换精度。通过虎门大桥ＧＰＳ网的实例，证明了上述方法的优越性。

In accordance with the requiring peculiarity of GPS bridge plane control networks,a datum transformation of using construction ellipsoid as reference of Gauss Krüger projection is proposed in this paper.The flaw due to the surveying area's quasi geoid tilting with reference ellispoid is corrected and more accuracy of the datum transformation can be made.Through the test of GPS control networks for Humen Bridge,this newly developed method has been verified having certain advantages over the existing methods.