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Definition of Isogone
1. Noun. An imaginary line connecting points on the Earth's surface where the magnetic declination is the same.
Definition of Isogone
1. a line on a map used to show characteristics of the earth's magnetic field [n -S]
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1. Noun. An imaginary line connecting points on the Earth's surface where the magnetic declination is the same.
1. a line on a map used to show characteristics of the earth's magnetic field [n -S]