Isogons (geodesy)

An isogon is an imaginary connecting line between locations with the same declination , i.e. the same deviation from magnetic north to geographical north . With the help of isogons in maps , the magnetic north direction of a compass can be corrected and the actual geographic north direction can be determined.

When the declination is zero, the isogon is also known as an agone .

The imaginary connecting line between places with the same annual change in magnetic declination is sometimes referred to as an isopore .

See also

• Isogons (disambiguation)
• Isogonic map
• Isoclinic
• Isoline

Individual evidence

1. ↑ Isopore . 1946. Retrieved July 20, 2015.
2. ↑ Forthright's Phrontistery . 2014. Accessed July 20, 2015.