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# What is the reference point for lines longitude and where is it?

Updated: 10/19/2022

Wiki User

13y ago

The reference for longitude ... the definition of 'zero' longitude ... is the Prime Meridian.

That imaginary line joins the north and south poles, and runs through Greenwich, a

suburb of London, UK.

Wiki User

13y ago

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Q: What is the reference point for lines longitude and where is it?
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### What are imaginary vertical lines found on maps are called?

Lines of longitude are imaginary vertical lines that represent the angular distance, in degrees, minutes, and seconds, of a point east or west of the Prime Meridian (Greenwich). Lines of longitude are often referred to as meridians. The lines of longitude run from the North pole to the South pole and at the poles all the lines of longitude intersect at a single point.

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### How do you use latitude and longitude coordinates to find an absolute location on a map?

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