Magnetic Poles

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The Earth

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Spin Axis

Spins in an easterly direction

North Pole

South Pole

Variation• Variation is the angle between the true meridian

and the magnetic meridian. Therefore, in the Northern Hemisphere, variation is the angle between true north and magnetic north.

• Lines drawn on a chart joining places having the same variation are called isogonic lines.

• Lines drawn on a chart joining places having no variation are called agonic lines.

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Longitude

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Latitude

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Compass Rose

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