Abstract
Based on the principle of trigonometric elevation measurement and the law of error propagation, the trigonometric elevation formula is derived in this paper. The factors that cause the trigonometric measurement error are analyzed accurately. It is considered that the use of a high-precision total station for the trigonometric elevation measurement under opposite conditions can reach the second-order level measurement accuracy.
Highlights
In this paper, the trigonometric elevation measurement of the total station replacing the second-order leveling was studied
Whether the trigonometric elevation survey can replace the second-order level survey has become an urgent problem for surveying and mapping staff
Where R is the radius of curvature of the earth, and
Summary
The trigonometric elevation measurement of the total station replacing the second-order leveling was studied. Conventional leveling has a short sight line, and it is very difficult to transmit second-order elevation in mountainous areas with large terrain differences and river crossings where measurement conditions are limited. With the advent of high-precision total stations, total stations are used to accurately measure distances and angles. Whether the trigonometric elevation survey can replace the second-order level survey has become an urgent problem for surveying and mapping staff. This article combines the principle and method of total station trigonometric elevation measurement to analyze the factors that cause its error. Equation (6) is the basic formula for one-way observation of height difference
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