groundpick; groundweft

This paper analyzes the relationship between the 1°meridian arc length and three different kinds of latitudes——geocentric latitude,geodetic latitude and re- duc.

本文分别讨论了子午弧长随地心、大地、归化纬度的变化规律,数值计算结果表明:以大地纬度和归化纬度而论。