Submitted by György Chityil ... on Fri, 01/19/2018 - 23:26 Hierarchy: NounDescription: {{cartography|navigation}} A line on a chart or map showing points of constant magnetic declination.Ngram: isogonic lineNgram Text: isogonic lineSource: WiktionaryIssue: 0Wiktionary tag: cartographynavigationNgram Count: 2
