2. In 1960 a line XY had a magnetic bearing of N 80°23' E. At that time the magneticdeclination was 3°45' west. In a new survey performed in 1987, the declination in thesame locality changed to 2o50' east, determine the magnetic bearing and true bearing ofthe line based on the new survey.3. The following are the observed data for an open compass traverse. Adjust theobserved directions and tabulate values accordingly.OBSERVED BEARINGFORWARDLINELENGTHBACKWARDABBCCDDEEFFG462.50m405.65m495.08m284.15m367.29m217.73 mS 40 25' WS 55°40' WN 36°15' WN 73°10' WS 44 45' WS 20°30' EN 40°30' EN 55°50' ES 35°55' ES 73 30' EN 44°45' EN 21°00' W4. The following are the observed lengths and magnetic bearings of a closed compasstraverse. Adjust the observed directions of each line and tabulate values accordingly.7402 15"26 50'60

Ans-2) Magnetic Bearing=N80°23'EDeclination=2°50' east

2. In 1960 a line XY had a magnetic bearing of N 80°23' E. At that time the magnetic declination was 3°45' west.. In a new survey performed in 1987, the declination in the same locality changed to 2050' east, determine the magnetic bearing and true bearing of the line based on the new survey.

2. In 1960 a line XY had a magnetic bearing of N 80°23' E. At that time the magnetic declination was 3°45' west.. In a new survey performed in 1987, the declination in the same locality changed to 2050' east, determine the magnetic bearing and true bearing of the line based on the new survey.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

In 1960 a line XY had a magnetic bearing of N 80°23’ E. At that time the magnetic declination was 3°45’ west. In a new survey performed in 1987, the declination in the same locality changed to 2°50’ east, determine the magnetic bearing and true bearing of the line based on the new survey.
In an old survey performed in 1965, a line AB had a magnetic bearing ofS75o10’W when the magnetic declination was 4o30’ west. In a new surveyperformed in 1987, the declination in the same locality changed to 2o50’ east.Determine the true bearing of AB in 1965, the magnetic bearing of AB in 1987, the true azimuth (from the north) of AB in 1987, and the back azimuth (from the south) of AB in 1965.
In an old survey performed in 1965, a line AB had a magnetic bearing of S75deg10’W when the magnetic declination was 4deg30’ west. In a new survey performed in 1987, the declination in the same locality changed to 2deg50’ east. Determine the true bearing of AB in 1965, the magnetic bearing of AB in 1987, the true azimuth (from the north) of AB in 1987, and the back azimuth (from the south) of AB in 1965.
Magnetic Declination: 1. In a compass survey made twenty years ago the observed magnetic bearing of a reference line XY was N 42'21' E when the magnetic declination was 6'25' East. Lately in 2018, a new survey was made and the declination in the same survey site changed to 10°35' West. Determine the following descriptions of line XY: a.) Its true bearing twenty years ago; b.) The true azimuth from North and South; c.) Its new magnetic bearing; and d.) The magnetic azimuth from North and South in 2018. 80°17 E 2. From the closed compass traverse shown, if the forward bearing of line AB is N 78'9' E, compute the: LEC, the bearing of the LEC and the RP. COURSE DIST. BEARING A-B B-C C-D D-E E-A 3140 111295 117.50 m 90*20 LATITUDE DEPARTURE D 111.30m 94 10 C
Magnetic Declination: 1. In a compass survey made twenty years ago the observed magnetic bearing of a reference line XY was N 42'21' E when the magnetic declination was 6'25' East. Lately in 2018, a new survey was made and the declination in the same survey site changed to 10°35' West. Determine the following descriptions of line XY: a.) Its true bearing twenty years ago; b.) The true azimuth from North and South; c.) Its new magnetic bearing; and d.) The magnetic azimuth from North and South in 2018.
In an old survey performed in 1965, a line AB had a magnetic bearing of S75°10'W when the magnetic declination was 4°30' west. In a new survey performed in 1987, the declination in the same locality changed to 2°50 east. The magnetic bearing of AB in 1987 should be a. N67°50'E b. S70°40'W c. S73°30'W d. N70°40'E e. S67°50'W
Sample Problem 6.4 A property line surveyed in 1975 by Engr. Carasco. The line was recorded with a magnetic bearing of S 57° 28' 15" W. The magnetic declination at the time of survey was 2° 43' E. Determine the true bearing and the azimuth of the property line (from North). Solution: MN 2° 43' Property Line Figure 6.16 Illustration of Sample Problem 6.4 The easiest way in dealing with angles is to illustrate the situation. After the illustration, the bearing and azimuth are determine mathematically based on the Figure. The magnetic declination is given with the magnitude of 2° 43' E. This means that the magnetic pole is inclined 2° 43' to the East of the true North. For the true bearing: The bearing of a line can be measure from either North or South Pole as long as its value is in between 0 to 90 degrees. In this problem, we will measure the bearing from South to meet the bearings criterion. Ob True = 57° 28'15" + 2° 43' Өъ Тrие — S 60° 11'15" W For the azimuth: The azimuth should be…
6] If the magnetic declination is 5deg 30min W during the time of the survey, what is the true bearing of line AB having a magnetic bearing of N 35deg 10min E? Show your diagram and solution.
Magnetic Declination: 1. In a compass survey made twenty years ago the observed magnetic bearing of a reference line XY was S 42°21' W when the magnetic declination was 7'45' west. Lately in 2018, a new survey was made and the declination in the same survey site changed to 9°12' East. Determine the following descriptions of line XY: a.) Its true bearing twenty years ago; b.) The true azimuth from North and South; c.) Its new magnetic bearing; and d.) The magnetic azimuth from North and South in 2018.
9. In an old survey performed in 1965, a line AB had a magnetic bearing of S 75°10' W when the magnetic declination was 4°30' west. In a new survey performed in 1987 the declination in the same locality changed to 2°50' east. What shoild be the magnetic bearing in of AB in 1987? 10. If azimuth from the North of line DE is 219°02' , what is the azimuth of DE from the South? 11. The azimuth from north of traverse line AB is 225°O0", If the succeeding line BC has a bearing of S 30°00' E, what is the deflection angle at station B? 3 ARC1202- SURVEYING
2. In 2010 a line had a magnetic bearing of Ñ80° 23' E. At that time the magnetic declination was 3° 45' west. In a new survey performed in 2017, the declination in the same locality changed to 2° 50' east. Determine the magnetic bearing and true bearing of the line based on the new survey. 3. In 2015 a line had a magnetic bearing of N50° 23' E. At that time the magnetic declination was 3° 45' west. Determine the true bearing and the present magnetic bearing of the line, if the annual variations of the same locality is 0° 10' east.
Magnetic Declination: 1. In a compass survey made twenty years ago the observed magnetic bearing of a reference line XY was S 42'21' W when the magnetic declination was 7'45' west. Lately in 2018, a new survey was made and the declination in the same survey site changed to 9'12' East. Determine the following descriptions of line XY: a.) Its true bearing twenty years ago; b.) The true azimuth from North and South; c.) Its new magnetic bearing; and d.) The magnetic azimuth from North and South in 2018. A 2. From the closed compass traverse shown, if the forward bearing of line AB is N 47'40' E. compute the: LEC, the bearing of the LEC and the RP. COURSE DIST. BEARING LATITUDE A-B B-C C-D D-E E-A 47 40 11820 12540 -90*20 E 115-30 m 117.50m DEPARTURE 31 40 80*17 D