Surveying
The meridian of a place is

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

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Surveying
Pick up the correct statement for horizontal photographs.

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

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Surveying
The length of a chain is measured from

outside of one handle to inside of other handle
centre of one handle to centre of other handle
outside of one handle to outside of other handle
inside of one handle to inside of other handle

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