That's the "Prime Meridian".
an imiginary line denoting o degrees longitude
Mexico is west of the Prime Meridian (0° of Longitude).
The Prime Meridian is made up of all the points with zero longitude and every latitude.
It is latitude lines. this is all from my geography class. hehehe
longitude.
0 degrees longitude
prime merdian
00
The prime meridian is a line at 0 degrees longitude.
The prime meridian is located at 0 degrees longitude.
The Equator is 0 degrees latitude, and the Prime (or Grenwich) Meridian is 0 degrees longitude.
longitude