(Q4) Compute the magnetic declination in the below figure, if you know the magnetic azimuth of the line DC is 314°54'03" and the geodetic coordinates as in the below table. Point Easting (m) A B 23445.25 23788.73 98°35′29" B Northing (m) 31670.87 31445.34 C 92°18'46"

(Q4) Compute the magnetic declination in the below figure, if you know the magnetic azimuth of the line DC is 314°54'03" and the geodetic coordinates as in the below table. Point Easting (m) A B 23445.25 23788.73 98°35′29" B Northing (m) 31670.87 31445.34 C 92°18'46"

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

(Q4) Compute the magnetic declination in the below figure, if you know the
magnetic azimuth of the line DC is 314°54'03" and the geodetic coordinates as in
the below table.
A
Point
A
B
Easting (m)
23445.25
23788.73
98°35'29"
B
Northing (m)
31670.87
31445.34
C
92°18'46"
D

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Complete solution Topic: : MAGNETIC DECLINATION
Compute the azimuths in the traverse (as shown in the figure), given that azimuth AB equals 126°55’17”, and that the angles within the traverse are the following: Angle A = 100˚45’35” Angle B = 231˚23’41” Angle C = 17˚12’56” Angle D = 89˚03’26” Angle E = 101˚34’22” Convert the given azimuths computed into bearings.
2. Complete the missing data. LINE DISTANCE (feet) BEARING AB 74.6039 DUE SOUTH ВС 132.2039 S 61.870 E CD 167.9143 N 75.55° E DE 183.9141 N 19.15° E EF 183.2644 N 59.88° W FG 124.8922 N 21.12° E GH 296.5704 DUE WEST HI 258.1493 S 38.75° E IJ
From the given field notes of a topographic survey using stadia and a theodolite (K = 100, C=0). Find the distance CD. STA. STADIA READINGS VERT. ANGLES ELEVATION LOWER MIDDLE UPPER 7.49 +4°29 CD 4.8 6.15 120.62m DE 3.4 4.80 6.2 +6°30' 131.48m