CE 211 Fall 2011 Engineering Surveying Traverse Computations – Section 2

Reading Materials: Chapter 7 and class notes Laboratory Assignment: (Group-based assignment. Same groups used in Lab 5) A loop traverse ABCDE has been established in a new construction site. It has the following distances, bearings and coordinates:

Point E has coordinates N 100.00 and E 1400.00.

Interior angles (measured to the right) are: o A 64o47’22” B 210o31’21” o C 62o29’15” D 112o20’45” o E 89o52’02”

DE has a bearing of S71o32’00”E

ED = 1154.65 ft, EA = 806.19 ft, DC=711.98 ft, CB=632.47ft, and BA=824.57ft

A rectangular building complex foundation KLMN (clockwise) is to be located inside the traverse loop. The project architect placed point K at coordinates N 270.00 and E 695.00 and positioned KL at 15o25’00” from the north. The foundation dimensions are KL=400 ft and KN=250 ft Lab Tasks

1. Compute angular error in interior angles measurements. Adjust the traverse’s interior angles

2. Compute the azimuths and bearings for the loop traverse links 3. Compute the error in departures and latitudes and the relative accuracy of the field

measurements 4. Adjust the traverse departures and latitudes using the transit method. Use the adjusted

departures and latitudes to determine the coordinates of the traverse stations. 5. Use the adjusted coordinates to determine the adjusted lengths of the traverse links.

Compute the traverse area in acres 6. Draw the traverse in Civil-3D. Label each point and list its coordinates. Also, for each

link, show the length of the link, its bearing, and its azimuth. The North arrow and the drawing scale should also be shown

7. Compute the coordinates of the foundation points KLMN 8. If point M is to be placed in the field using a side shot from traverse point A, compute

the angle BAM and the length of AM 9. If the location of point M is to be verified using the bearing-bearing intersection method

from points E and A, what are the angles AEM and EAM? 10. If the location of point M is to be verified using the distance-distance intersection

method from points A and E, what are the distances AM and EM? 11. Add the foundation to the traverse plot you developed in task 6. Show all the distances

and angles you computed in tasks 8, 9, and 10 in the drawings. Laboratory deliverable:

A print-ready word documents summarizing the output of the lab tasks. Please refer to the lab grading rubric for guidelines on lab report submissions.

Hard copy of the report is due at the beginning of class on Friday 10/07/2011.