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A prime meridian is an arbitrarily chosen meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle. This great circle divides a spheroid, like Earth, into two hemispheres: the Eastern ...
The meaning of PRIME MERIDIAN is the meridian of 0 degrees longitude which runs through the original site of the Royal Observatory at Greenwich, England, and from which other longitudes are reckoned.
The prime meridian is the line of 0° longitude, the starting point for measuring distance both east and west around Earth. The prime meridian is arbitrary, meaning it could be chosen to be anywhere.
The Prime Meridian is an imaginary line that divides the Earth into Eastern and Western Hemispheres. It is the longitude line with a value of 0 degrees and runs from the North Pole to the South Pole, passing through the Royal Observatory in Greenwich, London.
The prime meridian is the imaginary line that divides Earth into two equal parts: the Eastern Hemisphere and the Western Hemisphere. The prime meridian is also used as the basis for the world’s time zones. The prime meridian appears on maps and globes.
The prime meridian is zero degrees longitude and divides Earth into the Western and Eastern hemispheres. It is also known as the Greenwich Meridian because it passes through Greenwich, a borough of London, and terminates at the North and South poles.
Any north-south line can be a meridian. A prime meridian, however, is the meridian chosen to be zero degrees longitude for common reference: the line from which all locations east and west can be measured. For centuries, people have chosen different meridians to be their prime meridian.