Surveying
If the magnetic bearing of the sun at a place at noon in southern hemisphere is 167°, the magnetic declination at that place is

23° S
77° N
13° E
13° W

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Surveying
Accidental errors

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

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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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