Sources of error in compass

The following are the kinds of error which may occur while taking readings with a compass; INSTRUMENTAL ERRORS; the needle may not be perfectly straight and might not be balanced properly.; The pivot point may be eccentric, the graduations of the ring may not be uniform, the ring may not rotate freely on account of the pivot point being broken because of careless handling, the sight vane may not be straight and vertical. Technical Data used in the field explained in civil surveyor course in rawalpindi. the horse hair may not be straight and vertical.

PERSONAL ERORRS ;the centering may not be done perfectly over the station. the graduated ring may not be leveled. the object might not be bisected properly. The readings may be taken or entered carelessly .the observer may be caring magnetic substances. Some more details of civil surveyor course in rawalpindi are as under. There may be local attraction due to the presence of magnetic substances near the station. the magnetic field could vary on account of some natural causes.

the magnetic declination vary. PRECATIONS TO BE TAKEN IN COMPASS SURVEYING; the following precautions should be taken while conducting a compass traverse; the centering should be done perfectly. The stop the rotation of the graduated ring, the brake pin should be pressed very gently and not suddenly. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join civil surveyor course in islamabad.

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