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COMPASS SURVEYING (TYPES OF BEARING (MAGNETIC BEARING (DESIGNATION…
COMPASS SURVEYING
TYPES OF BEARING
FORE BEARING
BACK BEARING
TRUE BEARING
MAGNETIC BEARING
DESIGNATION
REDUCED BEARING
QUADRANTAL BEARING
TEMPORARY ADJUSTMENT OF COMPASS
LEVELLING
FOCUSSING
CENTERING
LOCAL ATTRACTION
NO
F.B ~ B.B = 180
Yes
F.B ~ B.B ≠ 180
DECLINATION
EAST DECLINATION
T.B = M.B + DECLINATION
WEST DECLINATION
T.B = M.B - DECLINATION
TYPES OF COMPASS
PRISMATIC COMPASS
SURVEYORS COMPASS