近代大地测量中，是利用恒星来测定地球某两地间子午线弧长的。
Modern geodesy, is used the stars to determine the earth a between meridian arc length.
只要精确测知一段子午线弧长，便会很容易地计算出地球的周长。
As long as the precise sensing a meridian arc length, we can easily calculate the circumference of the earth.
根据子午线弧长的计算原理，推导出一个新的子午线弧长计算实用公式。
According to the principle of calculating meridional arc length, a novel practical formula is given in this paper.
介绍了利用子午线弧长的直接算法来解算大地问题中截面椭圆弧长的一种直接解法。
The solution of arc length of sectional ellipse for geodetic problem, which is based on the direct algorithm of meridian arc length is introduced in this paper.
介绍了利用子午线弧长的直接算法来解算大地问题中截面椭圆弧长的一种直接解法。
This paper analyses the disadvantages of the previous sectional ellipse method in geodetic problem computation.
对坐标转换的基本概念和基本公式做了研究，给出了法截线曲率半径、子午线弧长和底点纬度的解算公式。
Research the basal concepts and formulas of coordinate conversion, the formulas of the radius of curvature in a normal section, the meridional length and the latitude of pedal are given.
对坐标转换的基本概念和基本公式做了研究，给出了法截线曲率半径、子午线弧长和底点纬度的解算公式。
Research the basal concepts and formulas of coordinate conversion, the formulas of the radius of curvature in a normal section, the meridional length and the latitude of pedal are given.
应用推荐