Ex29-6 : Compute the Coordinates for the traverse defined in Example 29.1 by applying correction to consecutive coordinates by Bowditch's method.

Solution :

Table 29.5 Adjustment of Coordinates of a closed-loop traverse using Bowditch's Rule

Sides

Length

( dij )m

Azimuth

( qi )

Consecutive coordinates, (m)

Bowditch's Correction (m)

Adjusted Consecutive coordinates, m

Departure ( Di )
Latitude ( Li )

Departure, d dij

Latitude, d l ij

Departure

Latitude

 

 

 

 

 

 

 

 

 

AB

372.222

0° 42'

4.547 

372.194  

0.375  

0.231 

4.922  

372.425  

 

 

 

 

 

 

 

 

 

BC

164.988

94° 42'

164.576  

-11.653  

0.166 

0.102  

164.742  

-11.551 

 

 

 

 

 

 

 

 

 

CD

242.438

183° 04'

-12.970 

-242.091  

0.244  

0.151  

-12.726  

-241.94  

 

 

 

 

 

 

 

 

 

DA

197.145

232° 51'

-157.136  

  -119.056

0.198 

0.122 

-156.938  

-118.934  

S 

L = 976.793

 

dD = -0.983

dL = -0.606

S = 0.983

S = 0.606

S = 0.000

S = 0.000

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