London.
Greenwich England
The prime meridian is the longitude (vertical) line that measures 0 degrees.
The greatest number of degrees anyone can be from the prime meridian is 180 degrees. This is because the prime meridian itself is located at 0 degrees longitude, and the maximum longitude value is 180 degrees both east and west. Therefore, any location can be a maximum of 180 degrees away from the prime meridian.
It is the "Prime Meridian" or the "0 degree Meridian" which is the basis for calculating time in most of the world.
Zero longitude is the prime meridian. Zero latitude is the Equator.
London, UK has a longitude of 0 degrees E. This longitude line is known as the Prime Meridian and it runs through the Royal Observatory in Greenwich, London.
Greenwich, England is located exactly at 0 degrees longitude, and it is considered the starting point for measuring longitude around the world.
latitude 0 north longitude 80 west
GMT-6
London is the major city located at 51 degrees north latitude and 0 degrees west longitude in the UK. It is the capital and largest city in the United Kingdom.
The 0 degrees longitude line is known as the Greenwich Meridian. From its name, it originated in Greenwich, a district in East London.
On my large-scale map, the mark for the center of London is located at about 51.5 degrees north latitude, 0.17 degrees west longitude. I'll bet it's the one you're thinking of.
longitude.
0 degrees longitude
latitude 0 north longitude 80 west
The prime meridian is located at 0 degrees longitude.
The prime meridian is a line at 0 degrees longitude.