To measure vertical angles accurately, the theodolite must be levelled with reference to ________.

Question

Computer · Surveying

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Correct answer

the altitude bubble on the index frame

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Answer 1

the altitude bubble on the index frame

Answer 2

the altitude bubble on the telescope

Answer 3

the bubble tube on the plate level

Answer 4

the altitude bubble on both the telescope and the index frame

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