tacheometric surveying

tacheometric surveying

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Tacheometer is a theodolite arranged with a stadia diaphram having three horizontal lines. The two stadia lines i.e. ,upper and lower are equidistant from the central horizontal line.

1. Tacheometric surveying is also known as the optical distance measuring method because an optical instrument i.e. a tacheo-meter is used in the surveying .
2. Various patterns of stadia diaphram are upper stadia diaphragam and lower stadia diaphragam.

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