Engineering Surveying LSGI2961

Engineering Surveying (LSGI2961)
Lecture 2
Distance and Angle measurements,
Position determination
Dr Lawrence Lau




1

, Outline


• General concept

• Angles/Directions

• Positioning

, General concept

The main purpose of a survey is to determine the relative
locations of points on, below or above the surface of the earth.


Measurements may be used to locate the point in space:

1. Horizontal angle measurements
2. Vertical angle measurements
3. Horizontal distance measurements
4. Vertical distance measurements

, General concept

Points in a horizontal plane can be defined by:

1. Distance and direction
2. Directions from two known points
3. Distances from two know points