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采用“施工椭球”定位方法 ,可以改正工程测区的似大地水准面相对于参考椭球面的倾斜 ,提高GPS数据转换的精度。本文进一步论述施工椭球面作为高斯投影参考面 ,可以减小起算点的定位误差对隧道控制网尺度的影响。一个隧道工程的实例证明采用施工椭球进行高斯投影转换具有这一明显优点
Using the “construction ellipsoid” positioning method, the inclination of the geoid like the reference ellipsoid can be corrected and the accuracy of GPS data conversion can be improved. This paper further discusses the construction ellipsoid as Gaussian projection reference surface, can reduce the starting point of the positioning error on the tunnel control network scale. An example of a tunneling project shows the obvious advantage of using a construction ellipsoid for Gaussian projection transformation