4) It is desired to determine the most probable value of an angle which has been measured at different times by different observers with equal care. The values observed were as follows: 74°39'45" (in two measurements), 74°39'27" (in four measurements), and 74°39'35" (in 3 measurements). A) 74°39'45" B) 74°45'39" C) 74°35'39" D) 74°39'34"

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Methods of Surveying

Surveying is the practice to determine the relative three-dimensional positions of various points on the earth’s surface. This is done by computing the vertical and horizontal distances, angles between the points, collecting the observations, and plotting them on a map of any appropriate scale. Accuracy can be achieved by using the latest instruments like a theodolite, tachometer, etc. Leveling is a subdivision of surveying where the objective is to locate the elevation of objects considering a datum level.