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 ?
In North America, the division between E and W variation runs on an isogonic line, often referred to as the agonic line, which roughly extends from Minneapolis/St.
With all the handheld GPSes, iStuff, and other gadgets, when did you last measure the distance between two points on a paper chart, measure your true course against the longitude and search for the nearest isogonic line to east-is-least your magnetic course?
Many other presentations contributed accounts of little known or unknown artefacts, for example the MS chart of isogonic lines c.1585 by Luis Texeira, and often provided new interpretations of their production and contexts.