The magnetic bearing of a line was recorded as N 34 00 E on an old survey plan dated 1947. In 1970, the isogonic chart shows a declination of 9° W for the area with an annual change of 4' eastward. Determine the azimuth of the line in 2020. Your answer

The magnetic bearing of a line was recorded as N 34 00 E on an old survey plan dated 1947. In 1970, the isogonic chart shows a declination of 9° W for the area with an annual change of 4' eastward. Determine the azimuth of the line in 2020. Your answer

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Control Survey and Geodetic reductions

Control surveys or survey controls are used to establish reference points as a basis for various construction activities. Vertical and horizontal control points are to be established in a control survey to increase accuracy. After establishing the control points, all other types of surveys such as topographic, right-of-way, aerial mapping, construction layout, boundary surveys, and utility mapping can be worked upon so that control networks can be formed. The place from which the observations are made is called a survey station.

Question

The magnetic bearing of a line was recorded as
N 34°00 E on an old survey plan dated 1947. In
1970, the isogonic chart shows a declination of
9° W for the area with an annual change of 4'
eastward. Determine the azimuth of the line in
2020.
Your answer
An airplane is 421km from radar station R at a
bearing of N 23 25' W. A second radar station
Q is 210km from R at a bearing of S 57 25' E.
Find the distance of the airplane from station
Q.

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Exercise Consider the following surveyed points presented in the figure below. The easting and northing of the point A (E=500, N=600). 1) Compute the Easting and the northing of the points B, C, D and E. 2) Compute the Azimuths GAB, and GAE. 3) Compute the deflection angle between AB and BC; and the deflection angle between CD and DE. N S63° 11' 27.32"E 1589.824 m N76° 34' 21.23"E 976.327 m B N65° 59' 59.15"E 1303.296 m N36° 07' 35.64"E 2257.235 m
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Correct solution
Complete solution Topic: : MAGNETIC DECLINATION
A vertical pole stands on a horizontal ground.. A geodetic engineer positioned due east of the pole measures the elevation of the top of the pole as 53.33 grads. He moves dué south 30 m. and measures the elevation of the top of the pole as 782.22 mils. Determine the height of the pole in meters. a) . 48.6 b) 39.4 c) 44.8 d). 58.6
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