Tacheometry is a surveying method that uses optical instruments, such as a theodolite or total station, to measure horizontal and vertical angles and distances. Some limitations of tacheometry include:
Limited range: Tacheometry can only measure distances up to a certain range, depending on the instrument used and the visibility of the target.
Weather conditions: Tacheometry is heavily dependent on visibility, so it is not practical to use in poor weather conditions such as fog, rain or snow.
Inaccuracies due to atmospheric conditions: The refraction of light through the atmosphere can cause inaccuracies in the measurements taken with tacheometry.
Limited precision: Tacheometry is not as precise as other surveying methods such as GPS or laser scanning, which can provide sub-millimeter accuracy.
Limited accessibility: Tacheometry requires line-of-sight between the instrument and the target, which can be obstructed by obstacles such as buildings or trees.
Time-consuming: Tacheometry can be time-consuming, as it requires the operator to manually measure angles and distances, and to record them.
Human error: Tacheometry is dependent on the skill and experience of the operator, and human error can lead to inaccuracies in the measurements.