Magnetic declination is important because it is the amount of degrees a compass must be shifted so that it's needle is pointing towards true north,...

What is magnetic declination and discuss its importance in surveying?

Magnetic declination, or magnetic variation, is the angle on the horizontal plane between magnetic north (the direction the north end of a magnetized compass needle points, corresponding to the direction of the Earth's magnetic field lines) and true north (the direction along a meridian towards the geographic North ...

What is the importance of calculating magnetic bearing?

Relative Position

Magnetic Declination – The angle given in degrees between True North and Magnetic North. Bearing is an accurate way of giving the direction of one place in relation to another. It is more accurate than direction because it has 360 degree points compared to the 16 points of a compass.