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FEMA US&R Response Sys/U.S. Army Corps of Engineers
STRUCTURES SPECIALIST SKILLS TRAINING
TST – Total Station Training
Session 1-1
Basic Measurement Tools
Theodolite vs. Total Station
1) Theodolites measure horizontal and vertical angles.
2) Total Stations combine theodolites with the ability to measure distance.
3) Both can be used as simple point observation devices
Angular Measurement
Azimuth
Zenith
Measurement Basics and Theodolite Use
Azimuth Angle
0
0
Zenith Angle
Measurement Basics and Theodolite Use Page 2
Azimuth
Horizontal plane
•
o
0
•
0
0
Angles are measured
•
clockwise
Zenith
Vertical plane
•
o
0
•
Angles are measured
•
down from vertical
October 2007
o
, 360
is straight ahead
is straight up, usually
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