Surveying
Local attraction in compass surveying may exist due to

loss of magnetism of the needle
presence of magnetic substances near the instrument
incorrect levelling of the magnetic needle
friction of the needle at the pivot

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Surveying
Transit rule of adjusting the consecutive coordinates of a traverse is used where

linear and angular measurements of the traverse are of equal accuracy
All of these
linear measurements are more accurate than angular measurements
angular measurements are more accurate than linear measurements

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