PROBLEM A surveyor set his instrument up at point A to observe points B and C which are both ahead of his set up point. The following data was tabulated based on his observations: ROD/Point Vertical Angle Stadia Hair Readings Upper 2.316 Middle Lower B -25°15' 1.877 1.438 +45°57' 3.333 2.011 0.689 Upon calibration, the focal length was found out to be 27cm. As advertised, the length of the instrument's telescope is 10cm and the length between the upper and lower stadia hairs of the telescope is 2.703mm. What is the stadia constant of the instrument? What is the stadia interval factor? What is the horizontal distance between points B & C? What is the difference in elevation between B & C?
PROBLEM A surveyor set his instrument up at point A to observe points B and C which are both ahead of his set up point. The following data was tabulated based on his observations: ROD/Point Vertical Angle Stadia Hair Readings Upper 2.316 Middle Lower B -25°15' 1.877 1.438 +45°57' 3.333 2.011 0.689 Upon calibration, the focal length was found out to be 27cm. As advertised, the length of the instrument's telescope is 10cm and the length between the upper and lower stadia hairs of the telescope is 2.703mm. What is the stadia constant of the instrument? What is the stadia interval factor? What is the horizontal distance between points B & C? What is the difference in elevation between B & C?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Draw the figure to illustrate your understanding of
the problem. Show complete formulas and solutions.
Round off to 3 decimal places. Enclose all final
answers in a box.
Transcribed Image Text:PROBLEM
A surveyor set his instrument up at point A to observe points B and C which are both ahead
of his set up point. The following data was tabulated based on his observations:
Stadia Hair Readings
Vertical
Angle
ROD/Point
Upper
Middle
Lower
-25°15'
2.316
1.877
1.438
C
+45°57'
3.333
2.011
0.689
Upon calibration, the focal length was found out to be 27cm.
As advertised, the length of the instrument's telescope is 10cm and the length between the upper and
lower stadia hairs of the telescope is 2.703mm.
What is the stadia constant of the instrument?
What is the stadia interval factor?
What is the horizontal distance between points B & C?
What is the difference in elevation between B & C?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 5 steps with 7 images
Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning