Course Content
Learn Farm Structure and Surveying with Rahul

Bearing Computation Formulas

  1. True Bearing (TB)

True Bearing =Magnetic Bearing ± Declination

True Bearing=Magnetic Bearing ± Declination

  • Use + if declination is East
  • Use – if declination is West

 

  1. Magnetic Bearing (MB)

Magnetic Bearing = True Bearing ± Declination

Magnetic Bearing=True Bearing ± Declination

  • Use + if declination is West
  • Use – if declination is East

 

Special Lines Related to Declination

Term

Description

Isogonic Lines

Lines connecting points with equal magnetic declination.

Agonic Lines

Lines connecting points with zero magnetic declination.

Scroll to Top