Surveying
The rise and fall method

is not suitable for levelling with tilting levels
is less accurate than height of instrument method
quicker and less tedious for large number of intermediate sights
provides a check on the reduction of intermediate point levels

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Surveying
Pick up the correct statement for horizontal photographs.

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

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