Isogonal Line (Noun)
Meaning
An imaginary line connecting points on the Earth's surface where the magnetic declination is the same.
Classification
Nouns denoting spatial position.
Examples
- An isogonal line is used to represent the magnetic declination of the Earth's magnetic field in navigation charts and maps.
- Pilots use isogonal lines to correct for the difference between magnetic and true north when navigating by magnetic compass.
- Isogonal lines are especially important in polar regions where the magnetic declination is greatest.
- Cartographers carefully plot isogonal lines on topographic maps to help hikers and backpackers navigate by compass.
- In aviation, isogonal lines are used to ensure that pilots can accurately determine their course and position.