Surveying
The point where a vertical line through the optical centre of the camera lens intersects the ground, is known as

Iso-centre
Ground principal point
Perspective centre
Ground plumb point

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Surveying
A telescope is said to be inverted if its

vertical circle is to its right and the bubble of the telescope is up
vertical circle is to its right and the bubble of the telescope is down
vertical circle is to its left and the bubble of the telescope is down
vertical circle is to its left and the bubble of the telescope is up

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

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