1. Coordinate Geometry and Traverse Surveying Faculty of Applied Engineering and Urban Planning Civil Engineering Department Lecture 8 - Week 5 2 nd Semester 2007/2008 UP Copyrights 2007 Engineering Control and Surveying

2. Introduction to Coordinate Systems World and Local Coordinates Coordinate Geometry Transformation of Coordinates Traverse Surveying Content

3. Transformation of Coordinates

4. In order to transform from local coordinates to the national coordinates:

7. Questions

8. Traverse Surveying

12. Purpose of the surveying: Property surveys to establish boundaries Location and construction layout surveys for highways, railways and other works Providing ground control points for photogrammetric mapping

13. Questions

14. Types of Traverse Open traverse: starts at known point and ends with unknown one.

15. Types of Traverse Closed traverse: starts at known point and ends with unknown one.

16. Choice of Traverse As close as possible to the details Distances shall be equal between stations Insure durability of stations No sight obstructions

17. Traverse Computations How to calculate the azimuth of a line

18. Traverse Computations How to calculate the azimuth of a line

19. Traverse Computations How to calculate the azimuth of a line

20. Questions

21. Traverse Computations Error Correction

22. Traverse Computations Error Correction To do so, two corrections are required: 1.Angle Correction 2.Position Correction

23. Traverse Computations 1) Angle Correction

24. Traverse Computations 1) Angle Correction

25. Questions

26. Traverse Computations 2) Position Correction Compass Rule (Bowditch Rule)

27. Questions

28. Traverse Computations Allowable Errors in Traverse Surveying

29. Questions

30. Example 7.9

33. Homework: Solve the example using procedure stated in the approach

34. Example 7.9

36. Questions

37. Example 7.10