A new method of surveying horizontal distance and elevation difference with theodolite-central hair stadia;
经纬仪测量水平距离和高差的新方法——中丝视距法
Based on the principle of the method of central hair stadia,this paper introduced the basic principle of pseudo-stadia,a new method.
基于经纬仪中丝视距法原理,提出了伪视距测量方法。