3 Angle Measurement

3 Angle Measurement - CE 111 Angle Measurements Types of...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
CE 111 Angle Measurements
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Types of angles: S M N L Z Horizontal angle – MLN Vertical angle – SLM Zenith angle – ZLS
Background image of page 2
Horizontal Angles Interior angles Exterior angles Deflection angles
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Vertical angles: Angles above/below the horizon (line of sight) Angles above the horizontal plane Plus angles angles of elevation Angles below the horizontal plane Minus angles angles of depression
Background image of page 6
Vertical angles: Zenith angles An angle of 30º above the horizon is a zenith angle of 60º
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What do we need to measure an angle? Reference or starting line Angular distance Direction of turning (+)
Background image of page 8
Types of Theodolites Direction Single center Repeating Double center
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Main components of a Theodolite Telescope Horizontal circle Vertical circle Level vials
Background image of page 10
Measuring angles…by repetition Setup theodolite (instrument) Zero the instrument (set/record reading on horizontal circle) Sight instrument on backsight and point Swing telescope to sight other points and record ‘direct’ readings Transit telescope to ‘reverse’ and re-establish backsight.
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/20/2011 for the course C E 111 taught by Professor Staff during the Spring '08 term at Iowa State.

Page1 / 26

3 Angle Measurement - CE 111 Angle Measurements Types of...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online