Points a, b, and c have mean sea elevation of 660 m, 626 m, and 600 m, respectively. meanwhile, point b is 10 km from point a and 12 km from point c. considering earth's curvature and refraction, determine the following: i. true difference in elevation between points a and C. Hint: assume an instrument is setup at point B. i. ii. true difference in elevation between points A and B. ii. Minimum height of tower to be constructed at point c 80 that point a will be visible enough from the top of the tower.

Points a, b, and c have mean sea elevation of 660 m, 626 m, and 600 m, respectively. meanwhile, point b is 10 km from point a and 12 km from point c. considering earth's curvature and refraction, determine the following: i. true difference in elevation between points a and C. Hint: assume an instrument is setup at point B. i. ii. true difference in elevation between points A and B. ii. Minimum height of tower to be constructed at point c 80 that point a will be visible enough from the top of the tower.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

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.

Question

Points a, b, and c have mean sea elevation of 660 m, 626 m, and 600 m, respectively. meanwhile, point b
is 10 km from point a and 12 km from point c. considering earth's curvature and refraction, determine
the following:
i.
true difference in elevation between points a and C. Hint: assume an instrument is setup at
point B.
i.
ii. true difference in elevation between points A and B.
ii.
Minimum height of tower to be constructed at point c 80 that point a will be visible enough
from the top of the tower.

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