最終更新日：2024/07/31

(cartography, navigation) An isogonic line; a curve connecting points on the Earth's surface whose magnetic declination is identical.

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isogonic

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isogonic

noun

(cartography, navigation) An isogonic line; a curve connecting points on the Earth's surface whose magnetic declination is identical.

The isogonic lines on the map indicate the variation in magnetic declination.

意味（1）

(cartography, navigation) An isogonic line; a curve connecting points on the Earth's surface whose magnetic declination is identical.