Zero
The Prime Meridian. Opposite Prime Meridian (180-degrees Longitude) is The International Date Lin.
To determine the longitude of a place, you need to find the meridian on which it is located. This meridian is known as the prime meridian, which is the line of longitude designated as 0°. By identifying the prime meridian and calculating the distance to the location's meridian, you can determine its exact longitude.
The Prime Meridian is a line of longitude, and it sits at 0 degrees longitude.
the prime meridian is the starting point when measuring the longitude
Prime Meridian. 180 longitude is the Iinternational Date Line, and the equator is 0 degrees latitude
prime meridian!Prime Meridian!PRIME MERIDIAN!PrImE MeRiDiAn!
The Prime Meridian is the definition of zero longitude.
The Prime Meridian is defined as Zero Longitude. Any longitude that you feel is "close" to zero is close to the Prime Meridian.
Use a sextant
The longitude of every point on the Prime Meridian is Zero.
The Prime Meridian is at zero degrees longitude and every possible latitude.
This is called the Prime meridian, it passes through Greenwich, England.