A) A back sight of 3.0545 m is taken on a point 50 m from the level. A fore sight 2.1604 m is taken on a point 250 m from the level. Compute the correct difference in level (height) between the two points, taking into effect: (i) The Earth curvature only. (ii) The Earth curvature and refraction together. (Note: if you do not know the earth curvature correction, you can derive it. Use earth radius = 6370 km. there is no mark allocated for that. All the results must be given to 4 decimals)

A) A back sight of 3.0545 m is taken on a point 50 m from the level. A fore sight 2.1604 m is taken on a point 250 m from the level. Compute the correct difference in level (height) between the two points, taking into effect: (i) The Earth curvature only. (ii) The Earth curvature and refraction together. (Note: if you do not know the earth curvature correction, you can derive it. Use earth radius = 6370 km. there is no mark allocated for that. All the results must be given to 4 decimals)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

An instrument is set-up at point A and vertical angles are observed at B -21º15' and C +33º45'. The height of instrument from point A = 1.5865m. The horizontal distance of BA and BC are 350.2552m and 904.5565m respectively. If point C is at elevation 620.6453m; a. Determine the elevation of B neglecting the effects of the curvature and refraction. b. Determine the elevation of the B making due allowance for the curvature and refraction,
Find combined cr.,
Which method should a topographer use to measure distance using the method in the image ? B 34 - k k GÖL a) upright method O B) Angle method C) polar method D) Horizontal plumb method TO) rectification method
subject : fundamentals of surveying
18. Please include complete solution and diagram if necessary
What will be the level difference between points A and Bif curvature and refraction effects are also taken into account for the case as given below: Level is setup at A and staff at B. RL of A = 160 m Height of instrument at A = 1.2 m Reading of staff at B= 1.950 m Distance between A and B = 425 m
3. In the figure below, a vertical angle of -14°30' is read to a target 1.75 m above point M. The measured inclined distance (S) is 644.15 m and the elevation of point K is 320.70 m above mean sea level. If the height of instrument at K is 1.27 m, the elevation of M, considering effects of the earth's curvature and atmospheric refraction, is? HORIZONTAL LINE HI = 1.27 m S= 644.15 m M RR = 1.75 m DATUM (MEAN SEA LEVEL) Elev K = 320.70 m DE -14°30
The slope distance and zenith angle observed from point X to point Y were 1501.85 ft. and 86°27'15". The instrument and rod target heights were equal. If the elevation of point X is 102.09 ft. above datum, what is the elevation of point Y? (Hint: Don't forget to account for curvature and refraction.)
A levelling staff is held vertical at distance of 100 mm and 300 mm from the axis of a tacheometer and the staff intercept for the horizontal sight are 0.99 m and 3.00 m respectively. Find the constant of the instrument. The instrument set up at station A and the staff held vertical at point B. With the telescope inclined at a depression angle 10° to horizontal the reading on the staff are 2.670, 1.835, 1.0 m. Calculate the RC of B and its horizontal distance from A. (Given that HI = 1.42 m, and RL of A = 450.5 m)
Help me Asap
Subject - Surveying
pls answer asap