Surveying
The meridian of a place is

An arc of the great circle which passes through the place and is perpendicular to the equator
A great circle whose plane is perpendicular to the axis of rotation and it also passes through the place
A great circle passing through the place and the poles
A semi-circle which passes through the place and is terminated at the poles

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Surveying
Pick up the correct statement for horizontal photographs.

The two sides of a road meet at the vanishing point
The lines parallel to the negative plane are projected as parallel lines
All listed here
Parallel lines do not appear parallel in central projection

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