1. Assume the magnetic bearing of line AB read in 1878 was N26°15′E. The declination at the time and place was 7°15′W. In 2000, the declination was 4°30′E. Determine the magnetic bearing in 2000

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 following observations were taken in reciprocal levelling. Staff reading at Instrument at A B A…

A:

Q: From the information given, determine the astronomic bearing and its magnetic bearing today

A: To determine astronomic bearing and magnetic bearing.   The astronomic bearing or true bearing…

Q: a 10) The following observation were made using a tacheometer fitted with an anallatic lens, the…

A: Given:  Multiplicative constant(K)=100 Additive constant(C)=0   Instrument station  Height of…

Q: stadia

A: This question is from Surveying.

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: The upper, middle and lower hair reading is 2.45 m, 1.86m, and 1.27 m respectively. Determine the…

A: Determine the horizontal distance from the instrument to the the observed point.

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.