Conversion of reduced bearing (RB) to whole circle bearing (WCB) and vice versa

The RB of any line can be converted to its equivalent RB as shown in Table 19.1.

Table 19.1 Conversion of RB to WCB (Figure 19.8)

Quadrant

Line

QB or RB

WCB

I

OA

Nq1° E

q1

II

OB

Sq2° E

180° - q1

III

OC

Sq3° W

180° + q3

IV

OD

Nq4° W.

360° - q4

Similarly the WCB of a line can be converted to its equivalent RB as shown in Table 19.2.

Table 19.2 Conversion of WCB to RB (Figure 19.9)

Quadrant

Line

WCB

RB

I

OA

q1 90°

Nq1° E

II

OB

90° q2 180°

S (180 -q2)° E

III

OC

180° q3 270°

S (q3 -180)° W

IV

OD

270° q4 360°

N (360 -q4)° W

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