The magnetic base of bearings for a closed traverse survey is S 760 30’ W and the magnetic declination at the site is 20 45’ E. Determine it's True North Azimuth in decimal degrees (enter only the numerical answer).
Question
The magnetic base of bearings for a closed traverse survey is S 760 30’ W and the magnetic declination at the site is 20 45’ E. Determine it's True North Azimuth in decimal degrees (enter only the numerical answer).
Solution
To solve this problem, we need to convert the given bearing to azimuth, and then adjust for the magnetic declination to find the true north azimuth.
-
Convert the bearing to azimuth: The bearing is S 76° 30' W. In the south-west quadrant, the azimuth is calculated as 180° + (90° - bearing). So, the magnetic azimuth is 180° + (90° - 76.5°) = 193.5°.
-
Adjust for magnetic declination: The magnetic declination is 20° 45' E, which means the magnetic north is 20.75° east of true north. To get the true north azimuth, we subtract the declination from the magnetic azimuth. So, the true north azimuth is 193.5° - 20.75° = 172.75°.
So, the True North Azimuth in decimal degrees is 172.75.
Similar Questions
The magnetic bearing of a boundary line was recorded as N 330 15’ W and the magnetic declination at the time was 30 45’ W. Determine the True Azimuth direction of the boundary line in decimal degrees (enter only the numerical answer)
If you measure an Azimuth of 358.5 degrees with a magnetic compass, and the Magnetic Declination of your location is 7.2 degrees West, what is the True Azimuth (report in numerical DD format, with no units)
Convert the Bearing direction N 430 07’ W into decimal Azimuth format (write only the numeric answer with 3 decimals and no units)
Convert the Bearing direction S 30 13’ 48" W into decimal Azimuth format (write only a numeric answer with 2 decimals and no units)
Magnetic declination only varies with location.Group of answer choicesTrueFalse
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.