Surveying
At the first point of Aeries, the sun moves

Southward
From south to north of the equator
From north to south of the equator
Northward

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Surveying
Accidental errors

Cannot be removed by applying corrections to the observed values
All of these
Are generally small
Do not follow any definite mathematical law

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Surveying
The rise and fall method

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

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