A surveyor conducts trigonometric leveling to determine the elevation of a target point P based on the elevation of a BM (given as 100.00 ft). The surveyor installs the total station at BM and reflector at target point P. Total station instrument height is measured to be 3.50 ft and the reflector height is read to be 6.00 ft. The vertical distance (VD) read from the total station is 2.748 ft. What is the elevation at P based on the above given conditions? a) 94.752 ft b) 99.752 ft c) 100.248 ft d) 105.248 ft

A surveyor conducts trigonometric leveling to determine the elevation of a target point P based on the elevation of a BM (given as 100.00 ft). The surveyor installs the total station at BM and reflector at target point P. Total station instrument height is measured to be 3.50 ft and the reflector height is read to be 6.00 ft. The vertical distance (VD) read from the total station is 2.748 ft. What is the elevation at P based on the above given conditions? a) 94.752 ft b) 99.752 ft c) 100.248 ft d) 105.248 ft

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter14: Highway Surveys And Location

Section: Chapter Questions

Problem 12P

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A stadia measurement was undertaken with a theodolite having an internal focusing telescope and stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62 m, the rod interval observed was 1.94 m; and with the horizontal hairs set at 1.50 m on the rod, the vertical angle reading was +13⁰45’. For a foresight to a control point, the rod intercept was 1.17 m; and with the horizontal hair reading of 1.60 m on the rod, the vertical angle observed was -7⁰18’. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.
A surveyor conducts trigonometric leveling to determine the elevation of a target point P based on the elevation of a BM (given as 100.00 ft). The surveyor installs the total station at BM and reflector at target point P. Total station instrument height is measured to be 3.50 ft and the reflector height is read to be 6.00 ft. The vertical distance (VD) read from the total station is 2.748 ft. What is the elevation at P based on the above given conditions? a) 94.752 ft b) 99.752 ft c) 100.248 ft d) 105.248 ft
The EDM slope distance between two points is 2,183.71 ft, and the vertical angle is 2º4530 (the vertical angles were read at both ends of the line and then averaged). If the elevation of the instrument station is 285.69 ft and the heights of the instrument, EDM, target, and reflector are all equal to 5.08 ft, compute the elevation of the target station and the horizontal distance to that station.
A stadia measurement was undertaken with a theodolite having an internalfocusing telescope and stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62 m, the rod interval observed was 1.94m; and with the horizontal hairs set at 1.50 m on the rod, the vertical angle readingwas +13⁰45’. For a foresight to a control point, the rod intercept was 1.17 m; andwith the horizontal hair reading of 1.60 m on the rod, the vertical angle observedwas -7⁰18’. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.
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 stadia measurement was undertaken with theodolite having an internal focusing telescope and a stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62m, the rod interval observed was 1.94m; and with the horizontal hairs set at 1.50m on the rod, the vertical angle reading was -13°45’. For a foresight to a control point, the rod intercept was 1.17m; and with the horizontal hair reading of 1.60m on the rod, the vertical angle observed was +7°18’. Determine the elevation of the line of sight at the instrument point.
A stadia measurement was undertaken with a theodolite having an internal focusing telescope and stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62 m, the rod interval observed was 1.94 m; and with the horizontal hairs set at 1.50 m on the rod, the vertical angle reading was -13 degree 45’. For a foresight to a control point, the rod intercept was 1.17 m; and with the horizontal hair reading of 1.60 m on the rod, the vertical angle observed was +7 degree 18’. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.
To determine the elevation of a detail point, a total station was set up on a traverse station known to have an orthometric height of 9.456 m. Then, a reflector with a rod with a height of 1.45 m was placed at the detail point, and the total station was aimed at this reflector, and a vertical angle of 949. 1258 and a horizontal distance of 59.168 m were observed. Please calculate the orthometric height of the detail point, considering that the height of the total station set up at the traverse station is 1.54 m from the ground
A stadia measurement was undertaken with a theodolite having an internal focusing telescope and a stadia interval factor of 98.8. when a backsight was taken on a turning point whose elevation is 205.62m, the rod interval observed was 1.94m; and with the horizontal hairs set at 1.50m on the rod, the vertical angle reading was -13 45’. For a foresight to a control point, the rod intercept was 1.17m; and with the horizontal hair reading of 1.60m on the rod, the vertical angle observed was -15 30’. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken. SKETCH THE PROFILE PLEASE
A stadia measurement was undertaken with a theodolite having an internal focusing telescopel and stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62 m, the rod interval observed was 1.94 m; and with the horizontal hairs set at 1.50 m on the rod, the vertical angle reading was +13°45'. For a foresight to a control point, the rod intercept was 1.17 m; and with the horizontal hair reading of 1.60 m on the rod, the vertical angle observed was -7°18'. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.
(i) The following notes refer to the reciprocal levels taken with one level : Instrument station A B Staff readings on A B 1.03 1.630 0.95 1.540 Remarks Distance AB = 800 m R.L. of A = 450 m Find (i) True R.L. of B (ii) Combined correction for curvature and reflection (iii) The error in collimation adjustment of the instrument.
This leveling method is employed when the point observed is higher than the line of sight of the instrument.