Surveying
Longitudes are measured from 0° to

180° eastward
180° westward
360° eastward
180° east or westward

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Surveying
The rise and fall method

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

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Surveying
Bowditch rule is applied to

determine the effect of local attraction
None of these
a closed traverse for adjustment of closing error
an open traverse for graphical adjustment

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