1.Whole circle bearing-
The bearing measures only in the clockwise direction from meridian or north direction is known as whole circle bearing.
2.Reduced bearing
The bearing measures with respective to either north or south direction in clockwise or anticlockwise manner is known as reduced or quadrantal bearing
3. Fore bearing
The bearing observed in the direction of progress of survey in clockwise manner is called fore bearing
4. Back bearing
The bearing observed in the direction of opposite of survey is called fore bearing.