In land surveying, a bearing is the acute angle measured clockwise or counterclockwise between north or south and a direction). It is used to define the direction of a line in relation to a reference meridian, which can be true north, magnetic north, grid north, or an arbitrary meridian. The angle is measured either from the north or south towards east or west and is represented by the letters N or S, followed by the angle value and the direction E or W. For example, N60E represents a bearing of 60 degrees east of north. Bearings are important for measuring angles of different lines for carrying out survey works. They can be referenced to a meridian chosen for convenience, and the meridian may be assumed, grid, magnetic, astronomic, or geodetic. Bearings can be measured in various angular units, such as degrees, and can be represented by a numerical value or two letters and the numerical value).