Coordinate Geometry and Traverse Surveying Faculty of Applied Engineering and Urban Planning Civil Engineering Department Lecture 8 - Week 5 2 nd Semester.

Coordinate Geometry and Traverse Surveying

Faculty of Applied Engineering and Urban Planning

Civil Engineering Department

Lecture 8 - Week 5

2nd Semester 2007/2008

UP Copyrights 2007

En

gin

eeri

ng C

on

trol an

d S

urv

eyin

g

• Introduction to Coordinate Systems

• World and Local Coordinates

• Coordinate Geometry

• Transformation of Coordinates

• Traverse Surveying

Content

Transformation of Coordinates

Transformation of CoordinatesIn order to transform from local coordinates to the

national coordinates:

Questions

Traverse Surveying

Traverse Surveying

Traverse Surveying

Traverse Surveying

Traverse Surveying

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

Questions

Types of Traverse

Types of Traverse

• Open traverse: starts at known point and ends with unknown one.

Types of Traverse

Types of Traverse

• Closed traverse: starts at known point and ends with unknown one.

Choice of Traverse

• As close as possible to the details

• Distances shall be equal between stations

• Insure durability of stations

• No sight obstructions

Traverse Computations

How to calculate the azimuth of a line

Traverse Computations

How to calculate the azimuth of a line

Traverse Computations

How to calculate the azimuth of a line

Questions

Traverse Computations

Error Correction

Traverse Computations

Error Correction

To do so, two corrections are required:

1. Angle Correction

2. Position Correction

Traverse Computations

1) Angle Correction

Traverse Computations1) Angle Correction

Questions

Traverse Computations2) Position Correction

Compass Rule (Bowditch Rule)

Questions

Traverse ComputationsAllowable Errors in Traverse Surveying

Questions

Example 7.9

Example 7.9

Example 7.9

Example 7.9

Homework: Solve the example using procedure stated in the approach

Example 7.9

Example 7.9

Questions

Example 7.10

Example 7.10