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 |
0° ≤ 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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