Whole Circle Bearing and Quadrantal Bearing (Reduced Bearing) are two different types of bearing measurement used in surveying. To choose between these two types of bearing measurement a surveyor must know the differences between them. The main differences between Whole Circle Bearing and Quadrantal Bearing (Reduced Bearing) are given below.

Whole-Circle-Bearing-vs-Quadrantal-Bearing-or-Reduced-Bearing
 Whole Circle BearingQuadrantal Bearing/Reduced Bearing
1

The horizontal angle made by a line with the magnetic north in the clockwise direction is the whole circle bearing of the line.

The horizontal angle made by a line with the magnetic north or south (whichever is closer from the line) in the eastward or westward direction is the Quadrantal Bearing or Reduced Bearing of the line

2 Only the magnetic north line is considered as reference line in whole circle bearing system. Both magnetic north and south lines are considered as reference line in quadrantal bearing system.
3 The cloclwise angle from the reference line is Only taken Both cloclwise and anticloclwise angle from the reference line is Only taken
4 The value of the whole circle bearing varies from 0° to 360° The value of the reduced bearing varies from 0° to 90°
5 Example: 26°, 121°, 245°, 350° etc. Example: N26°E, S59°E, S65°W, N10°W etc.

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