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26/02/2019 02:41:59 PM

Basic Surveying - Theory and Practice : Azimuths

Azimuths 

The azimuth of a line on the ground is its horizontal angle measured 
from the meridian to the line.  Azimuth gives the direction of the line with 
respect to the meridian.  It is usually measured in a clockwise direction 
with respect to either the north meridian or the south meridian.  In plane 
surveying, azimuths are generally measured from the north. 
When using azimuths, one needs to designate whether the azimuth is 
from the north or the south. 
Azimuths are called true (astronomical) azimuths, magnetic azimuths, 
grid azimuths, or assumed azimuths depending on the type of meridian 
referenced. 
Azimuths may have values between 0 and 360 degrees.
 
 
The azimuth from the North for each line is: