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为消减高铁线路测量中长度投影变形,该文建立了抵偿高程投影面高斯投影坐标系、任意带高斯投影坐标系和抵偿高程投影面任意带高斯投影坐标系,并将其应用在测区,结果表明采用抵偿高程投影面任意带高斯投影坐标系后的投影变形值都不超过2.5cm/km,且变形值大小在(-0.99cm,2.1cm)之间,是最有效的消减长度投影变形的方法。
In order to reduce mid-length projection deformation of high-speed railway lines, a Gaussian projection coordinate system which compensates elevation projection surface, an arbitrary Gauss projection coordinate system and an arbitrary Gauss projection coordinate system to compensate elevation projection surface are established and applied to the survey area. It shows that the projection deformation value of any projection with Gaussian projection is no more than 2.5cm / km and the deformation value is between (-0.99cm, 2.1cm), which is the most effective projection length reduction method.