Single-ended Trigonometrical Heighting

• Single-ended trigonometrical heighting is a method of observation which taken from one end of the line only.
  
• The curvature of the earth and the refraction of the light by atmosphere are taken.
  
• 
  

 

    B

    
 

 

 

 

     A

Diagram 1

• The diagram above shows that the Total Station is set up at point A and a prism is placed at point B.
  
• The vertical angle and slope distance is measured from A to B only.