Computer · Surveying
In trigonometric levelling, which of the following is NOT a valid case classification for determining the difference in elevation of an object?
- 1Base of the object accessible
- 2Base of the object inaccessible: Instrument stations in the same vertical plane as the elevated object
- 3Base of the object inaccessible: Instrument stations not in the same vertical plane as the elevated object
- 4Base of the object accessible: Instrument stations in different horizontal planes with no vertical alignment possible✓
Correct answer
Base of the object accessible: Instrument stations in different horizontal planes with no vertical alignment possible
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