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The following table shows the measured lengths of traverse legs and the azimuth of each leg as computed in a previous example. B-C C-D D-F F-A Traverse A-B Leg Length (m) 164.950 Computed 71 11 30 Azimuth 88.41 121.69 115.89 68.42 149 00 24 224 18 36 291 13 42 352 39 34 B с А. (1) Compute the precision of this traverse. (2) Adjust the traverse using the Bowditch method. (3) Compute coordinates of all traverse points knowing that the coordinates of point A are (1000E, 2000N). (4) Checking is mandatory for every step. F D
1) The total length of the vector of linear misclosure is: d=/(SAE) +(SAN) = 0.171m Relative Precision = Linear Misclosure 8 Total Traverse Length EL = 1/3270.6 2) Corrections to Latitudes and Departures and corrected latitudes and departures are shown in the solution table in the following slide. 3) The calculated station coordinates are also shown in the following table. 4) The highlighted cells in the table indicate the checks.
Stn/ leg Length L (m) Azimutha Departure Latitude AE=L sin a AN =L cosa Departure Correction Latitude Correction Corrected Dept.AE Corrected Lat.AN E N A 1000.00 2000.00 AB 164.95 | 71°11'30" 156.142 53.180 0.031 -0.04 156.173 53.14 B 1156.173 2053.14 BC 88.41 149°00'24" 45.526 -75.788 0.017 -0.021 45.543 -75.809 с 1201.716 1977.331 CD 121.69 224°18'36"| -85.005 -87.078 0.023 -0.029 -84.982 -87.107 D 1116.734 1890.224 DF 115.89 291°13'42" -108.026 41.962 0.021 -0.028 - 108.005 41.934 F 1008.729 1932.158 FA 68.42 352°39'34" | -8.742 67.859 0.013 -0.017 -8.729 67.842 Comp. A 1000.00 2000.00 Σ 559.36 OAE --0.105 SAN = 0.135 0.105 -0.135 0 0 ? ? ? Check Σ.- δΔΕ Eend comp. = Nend comp. . =- SAN E = Eend-Estart E = Nend - Nstart Eend known Nend known (OK) (OK) (OK) (OK) (OK) (OK)
solve solve ASAP showing the steps
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solve solve ASAP showing the steps
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