Longitude

usgb/ˈlɑːndʒɪtuːd/
noun

Longitude is an imaginary line on the earth's surface that goes from the North Pole to the South Pole.

The city of London is located at 0 degrees longitude.
Visual representation of "longitude" - Longitude is an imaginary line on the earth's surface that goes from the North Pole to the South Pole.

Often appears as...

  • prime meridian longitude
  • longitude coordinates

Usage tips

Technical

Definition 1 of 2
Visual representation of "longitude"
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Geographic Grid

Longitude is part of a grid system used to pinpoint locations on Earth.

Illustration for Geographic Grid
To find a place, combine its longitude with its latitude.
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Measure of Distance

One degree of longitude varies in actual distance depending on where you are on the globe.

Illustration for Measure of Distance
Degrees of longitude are closer together near the poles.
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Time Zones

Longitude is related to time zones, with each zone generally spanning 15 degrees of longitude.

Illustration for Time Zones
Countries adjust their clocks based on their longitude.
Visual representation of the word "Longitude"

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