A meridian of longitude is an imaginary line that joins the north and south poles.
For every imaginable latitude, there's point on the meridian with that latitude, and
all of the points on it have the same longitude.
From the North pole to the South pole.
The Prime Meridian.
-- Origin of longitude -- Zero degrees longitude -- Boundary between Eastern and Western Hemispheres -- Greenwich Meridian
By international agreement, the line that defines the origin of longitude is the Prime Meridian. It joins the north and south poles and passes through the Royal Observatory at Greenwich, England.
Lines of Longitude are imaginary lines that run from the North Pole to the South Pole. The main line of longitude, the Prime Meridian (zero longitude), passes through the Greenwich Observatory, London, England.
The Prime Meridian is ONE line of longitude that runs from 0 degrees north to 0 degrees south. While a meridian can be any line of longitude.
The Prime Meridian.
the prime meridian
The Prime Meridian.
Prime Meridian
Longitude lines measure how far (in degrees) you are East or West of the Prime Meridian (which is a longitude line that runs through Greenwich, England and is designated as 0° longitude).
-- Origin of longitude -- Zero degrees longitude -- Boundary between Eastern and Western Hemispheres -- Greenwich Meridian
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.
By international agreement, the line that defines the origin of longitude is the Prime Meridian. It joins the north and south poles and passes through the Royal Observatory at Greenwich, England.
prime meridian
That line is called the Prime Meridian and it runs from the north pole to the south pole, mostly over the ocean.
Meridian
Lines of Longitude are imaginary lines that run from the North Pole to the South Pole. The main line of longitude, the Prime Meridian (zero longitude), passes through the Greenwich Observatory, London, England.