全站仪中间设站法三角高程测量方法及精度研究

水准测量作业简单、精度高,成为高程控制测量的主要方法,但在高山地区因高差大,精度难以保证。现在用三角高程测量代替水准测量得到了广泛应用。本文从三角高程的测量原理出发,根据误差传播定律,推导出全站仪中间法三角高程测量的中误差。最后以云南曲靖市某路段为例,将全站仪中间法三角高程测量和水准测量的数据进行了对比,结果表明:全站仪中间法三角高程测量的精度完全可以达到三等水准测量的要求。

Accuracy Analysis of Trigonometric Leveling by Using Total Station Intermediate Station Method

As a simple and high precision method,leveling has become the main method for height control survey. However,it is difficult to guarantee the accuracy because of the great height difference in the mountain area. Now,trigonometric leveling as the substitute of leveling has been widely applied. Starting from the principle of trigonometric leveling,the error of trigonometric leveling in total station intermediate method is derived according to the law of error propagation. Taking a road section in Qujing City of Yunnan Province as an example,the data of trigonometric leveling and intermediate leveling with total station are compared. The result shows that the accuracy of intermediate trigonometric leveling with total station can completely meet the requirements of third-class leveling.