Surveying
Benchmark is established by

spirit levelling
hypsometry
barometric levelling
trigonometrical levelling

ANSWER DOWNLOAD EXAMIANS APP

Surveying
The rise and fall method

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

ANSWER DOWNLOAD EXAMIANS APP