20 June 2016.Site Survey - Chapter 5 Linear Surveying

20 June 2016, Monday, 11am. Site Surveying Lecture 5 Linear Surveying

 

 

Linear Measurements : Approximate

Using Passometer : A passometer s a watch like instrument which is carried vertically in the pocket of shirt or tied to a leg. it records number of steps taken. thus the problems of counting number of steps is eliminated in this approximate method of liner measurement

If you change your car wheel from 15 inches to 16 inches, do you think the speedometer will still accurate to measure the speed?

 

Catenary mean a curve formed by a wire, rope, or chain hanging freely from two points and forming a U shape.

 

thing must not missed when reading this map

1. legend
2. note
3. date
4. authorized
5. boundary