geographic longitude

geographic longitude

[¦jē·ə¦graf·ik ′län·jə‚tüd]
(geodesy)

geodetic longitude

The angle between the plane of the reference meridian and the plane through the polar axis and the normal to the spheroid. It is the astronomical longitude corrected for the prime vertical component of the deflection of the vertical divided by the cosine of the latitude. This is the longitude used for charts. Also called geographic longitude
References in periodicals archive ?
If L is the geographic longitude of the place, then I calculate the instant of centrality on the central line at longitude L+0.

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