The bearing of a line from A to B was measured as S 16°45' W. It was found out that there was a local attraction at both A and B, and therefore a forward and backward bearing were taken between A and a point C at which there was no local attraction. If the bearing of AC was S 30'10' E and that of CA was N 28 15' W, determine the correct bearing of line AB.

Solid Waste Engineering
3rd Edition
ISBN:9781305635203
Author:Worrell, William A.
Publisher:Worrell, William A.
Chapter8: Landfills
Section: Chapter Questions
Problem 8.9P
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In 1939, the observed compass bearing of a
certain property line was N 84 20' W. At that
time an iron fence near the property line
caused a local attraction of 3' W and the
declination in 1939 was 7 W. Since then, it was
observed that the declination was decreasing
by 5' annually. The fence was removed in 1945.
Determine the observed bearing of the
property line in the year 1990.
Your answer
The bearing of a line from A to B was
measured as S 16 45' W. It was found out that
there was a local attraction at both A and B,
and therefore a forward and backward bearing
were taken between A and a point C at which
there was no local attraction. If the bearing of
AC was S 30 10' E and that of CA was N 28 15'
W, determine the correct bearing of line AB.
Your answer
Transcribed Image Text:In 1939, the observed compass bearing of a certain property line was N 84 20' W. At that time an iron fence near the property line caused a local attraction of 3' W and the declination in 1939 was 7 W. Since then, it was observed that the declination was decreasing by 5' annually. The fence was removed in 1945. Determine the observed bearing of the property line in the year 1990. Your answer The bearing of a line from A to B was measured as S 16 45' W. It was found out that there was a local attraction at both A and B, and therefore a forward and backward bearing were taken between A and a point C at which there was no local attraction. If the bearing of AC was S 30 10' E and that of CA was N 28 15' W, determine the correct bearing of line AB. Your answer
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