A backsight is taken on a benchmark of elevation 500 m, rod reading of 1.50 meters, vertical angle of – 30° 25’, and horizontal distance from instrument of 75.6 m. A foresight is taken on a point A with rod reading of 0.80 m., vertical angle of + 20° 15’, and a slope distance of 40.50 m from the instrument. If the height of instrument is 1.20 m. and the instrument is situated along the line between BM and point A, determine the elevation of point A and the grade from BM to point A disregarding the effect of curvature and refraction.

Q: Following observations were taken for determining the R.L. of station A. Instrument -station Height…

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Q: If the angle error limit is 1:4000. What is the maximum angle error allowed?

A: Given: The angle of error limit is 1:4000.

Q: 2) Given the following data: Table 1: Differential Leveling Observations Station A ΤΡΙ B TP2 A…

A: To Determine :- a. What is the loop misclosure? b. What is the corrected elevation of point B using…

Q: An elevation must be established on a benchmark on an island that is 2536.98 ft from the nearest…

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Instruments for Surveying

Surveying is the practice that determines the relative three-dimensional positions of many different points on the earth’s surface. There are various instruments used in Surveying like Theodolites, Total station, Tripod stands, Plane table, etc. for measuring horizontal angle, vertical and sloping angle, which are very useful for giving accurate and precise measurement.