Tacheometric survey, also known as stadia surveying, is a type of surveying method that uses a theodolite or a total station instrument to measure angles and distances between points. The distances and angles are used to calculate the coordinates of the points, allowing the surveyor to create a map or a model of the surveyed area.
In tacheometric survey, the theodolite or total station is set up at a known point and aimed at a target at a second point. The instrument measures the horizontal and vertical angles to the target, and the distance to the target is determined using a stadia rod or an electronic distance measurement (EDM) device.
Tacheometric survey is a precise and efficient surveying method that is commonly used for topographical surveys, boundary surveys, and construction surveys. It is particularly useful for surveying large areas and for obtaining precise measurements in difficult terrain.
The main advantage of tacheometric survey is its accuracy and speed, as it allows the surveyor to quickly obtain a large number of measurements in a relatively short amount of time. Additionally, it is less subject to errors due to atmospheric conditions or obstacles blocking the line of sight, compared to other surveying methods, such as leveling or chain surveying.
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