London.
London
Mexico City is at 19.24 N Latitude and 99.09 W Longitude.
The prime meridian is a line at 0 degrees longitude.
0 degrees latitude and 0 degrees longitude.
All parallels, or latitudes, cross 0 degrees longitude. 0 degrees longitude is the prime meridian. 0 degrees latitude, or parallel, is the equator
London.
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latitude 0 north longitude 80 west
GMT-6
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 a line at 0 degrees longitude.
London
The Equator is 0 degrees latitude, and the Prime (or Grenwich) Meridian is 0 degrees longitude.