Meridian vs. Longitude
Meridian and longitude are two terms used to describe geographic locations on the Earth. They are both angles measured in degrees and minutes, and they both refer to the East-West direction. The difference between the two is that a meridian is an imaginary line from the North to South pole, while longitude is an angle measured from the Prime Meridian.
The Prime Meridian is an imaginary line running from the North Pole to the South Pole, and it is the reference point for measuring longitude. The Prime Meridian is located at 0° longitude, and runs through Greenwich, England. Longitude is measured in degrees east or west of the Prime Meridian. For example, if you are located in New York City, you would be located at 74° W longitude.
A meridian is an imaginary line that runs from the North Pole to the South Pole. It is used to measure latitude. The Equator is the reference point for measuring latitude, and is located at 0° latitude. Latitude is measured in degrees north or south of the Equator. For example, if you are located in Chicago, you would be located at 42° N latitude.
In summary, meridians are imaginary lines running from the North to South pole, while longitude is an angle measured from the Prime Meridian. Both terms are used to describe geographic locations on the Earth, and both measurements are in degrees and minutes.