line XY was S50°18’E when the magnetic declination was 8°15’ East. Lately in 1986, a new survey was made and the declination in the same survey site changed to 12°10’ West. Determine and illustrate the following descriptions of line XY: a) Its true bearing b) The azimuth from north and south c) Its new magnetic bearing d) The magnetic azimuth from south in 1986.

Q: the bearing of line in 1975 was found to be N 19°09`W. in 2003, it was found out that at the said…

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Q: The true and magnetic bearing of a line are 78° 45' and 75° 30' respectively. What is the magnetic…

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Q: 1. Transform the following azimuth to bearing (plot/draw the azimuth and bearing and show your…

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Q: An open traverse PQRST is surveyed using a theodolite and the consecutive coordinates obtained are…

A: Given data- An open traverse PQRST given, Northing, Southing, Easting & Westing values are given…

Q: N E S89° 54' 35.40"E 1358.281 m N51° 27' 45.34"E 1778.904 m N65° 59' 59.15"E 1303.296 m S25° 35'…

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Q: In an old survey performed in 1965, a line AB had a magnetic bearing of S75deg10’W when the magnetic…

A: Given Data:Magnetic Bearing = S75°10'WMagnetic declination = 4°30'Change in Magnetic declination =…

Q: Survey- The observed magnetic bearing of a line OE was found to be 185°. It was later discovered…

A: Observed MB=185o Local attraction=+1.5o Magnetic declination d=3.5o   It is needed to find the true…

Q: 1) The observed compass bearing of a line in 1991 was S37°30'E and the magnetic dedination of the…

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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.