Surveying
In a truly vertical photograph,

Iso-centre coincides the plumb point
Plumb point coincides the principal point
Principal point coincides the isocenter
All listed here

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Surveying
Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations?

Measuring angle at one station and distance from other
Measuring distance from two points on traverse line
Measuring angle and distance from one transit station
Measuring angles to the point from at least two stations

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