isogonic

名詞

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

日本語の意味

等磁偏角線：地図学や航海学の分野で、地球上の各地点における磁偏角（地磁気のずれ）が同一である点を結んだ曲線。

Before departure, the captain studied the isogonic on the chart to account for magnetic variation.

出航前、船長は海図上の等偏角線を調べて磁気偏差を考慮した。

意味（1）

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

isogonics

（ plural ）