isogonic line


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isogonic line

n.
A line on a map connecting points of equal magnetic declination.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.isogonic line - an imaginary line connecting points on the Earth's surface where the magnetic declination is the same
line - a spatial location defined by a real or imaginary unidimensional extent
References in periodicals archive ?
Edmond Halley introduced the isogonic lines or magnetic meridians in the southern hemisphere and Louis Duperrey situated the magnetic South Pole at 76[degrees]S and 135/6[degrees]E.