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Is magnetic declination change with change of place? if yes then how ,if no then why.

Is magnetic declination change with change of place? if yes then how ,if no then why.

Grade:12th Pass

1 Answers

Rahul Kumar
131 Points
9 years ago

Magnetic declination is the angle between magnetic north (the direction the north end of a compass needle points) and true north. The declination is positive when the magnetic north is east of true north. The term magnetic variation is a synonym, and is more often used in navigation. Isogonic lines are where the declination has the same value, and the lines where the declination is zero are called agonic lines.

Somewhat more formally, Bowditch defines variation as the angle between the magnetic and geographic meridians at any place, expressed in degrees and minutes east or west to indicate the direction of magnetic north from true north. The angle between magnetic and grid meridians is called grid magnetic angle, grid variation, or grivation. Called magnetic variation when a distinction is needed to prevent possible ambiguity. Also called magnetic declination.

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