Surveying
The type of surveying which requires least office work is

plane table surveying
theodolite surveying
trigonometrical levelling
tacheomefry

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Surveying
A ’level line’ is a

horizontal line
line parallel to the mean spheriodal surface of earth
line passing through the objective lens and the eye-piece of a dumpy or tilting level
line passing through the center of cross hairs and the center of eye piece

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