What is Declination and Dip in Surveying? Updated

Magnetic declination is the horizontal angle and direction by which the needle of the compass (magnetic meridian) deflects from the true meridian at any particular locality. A dip meter is a vertically mounted compass that when placed in various locations of the earth will give various angles of the earth's magnetic field with the vertical plane. This angle is called the angle of dip. Its value is 0° at the equator and 90° at the magnetic poles.
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