Example 28-3 : Determine the azimuth of a closed traverse from (Figure 28.6) Interior angles by making correction using by azimuth adjustment method.
Solution :
Table 28.4 Calculation of Adjusted of Azimuths of a Closed Traverse from Interior Angle (Figure 28.6)
Line (1) |
Interior Angle (2) |
Azimuth (3) |
Correction (4) |
Adjusted |
At (a) |
Value (b) |
Azimuth (5) |
AB |
|
|
62° 00' 00" |
Fixed |
|
BA |
|
|
242° 00' 00" |
|
|
|
B |
106° 11' 20" |
|
|
|
BC |
|
|
135° 48' 40" |
-20" |
135° 48' 20" |
CB |
|
|
315° 48' 40" |
|
|
|
C |
59° 44' 40" |
|
|
|
CD |
|
|
256° 04' 00" |
-40" |
256° 03' 20" |
DC |
|
|
76° 04' 00" |
|
|
|
D |
254° 16' 20" |
|
|
|
DE |
|
|
181° 47' 40" |
-1' 00" |
181° 46' 40" |
ED |
|
|
1° 47' 40" |
|
|
|
E |
38° 17' 20" |
|
|
|
EA |
|
|
323° 30' 20" |
-1' 20" |
323° 29' 00" |
AE |
|
|
143° 30' 20" |
|
|
|
A |
81° 28' 40" |
|
|
|
AB |
|
|
62° 01' 40" |
-1' 40" |
62° 00' 00" |
AB |
|
|
62° 00' 00" |
Fixed |
|
Angular error in closure = |
1' 40" |
|
|
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