The imaginary line is called the Prime Meridian.
Longitude is measured in degrees east or west of the Prime Meridian, which is the starting point for the Earth's longitudinal coordinate system. Longitude lines run north-south and indicate positions to the east or west of the Prime Meridian, which passes through Greenwich, England.
The Prime Meridian is the line of 0 degrees longitude, dividing the Earth into the Eastern and Western Hemispheres. Any location east of 100 degrees west longitude falls in the Western Hemisphere because it is measured westward from the Prime Meridian towards the International Date Line. Thus, the half of the map east of 100 degrees west is in the Western Hemisphere.
Fifteen degrees east longitude
The Prime Meridian and the meridian of 180° longitude, together, do.
In geography, a meridian is a line of longitude that runs from the North Pole to the South Pole and measures the east-west position of a point on the Earth's surface. The Prime Meridian, located at 0 degrees longitude, is the starting point from which all other meridians are measured.
Longitude !
The distance from the prime meridian is usually measured in degrees of longitude. The distance east or west of the prime meridian is referred to as "longitude."
The Prime Meridian, located at 0 degrees longitude, serves as the starting point for measuring longitude both east and west. It runs through the Royal Observatory in Greenwich, London. Locations to the east are measured in degrees east, while those to the west are measured in degrees west.
Longitude is measured in degrees east or west.
Longitude is measured in degrees east or west.
Distance East or West of the prime meridian is measured in degrees of longitude.
It is neither. The prime meridian is 0 degrees longitude. All other meridians are measured from this. East or west to 180 degrees.
Longitude is the angular measurement in degrees east or west of the Prime Meridian. The Prime Meridian is at zero degrees; going east, your longitude is in degrees and minutes east, while going west your longitude is measured in degrees and minutes west. A circle is 360 degrees, so the maximum longitude is 180 degrees either way. At the 180 degree line (called the "anti-meridian") the measurement is neither east nor west.
Longitude is measured in degrees, minutes, and seconds east or west of the Prime Meridian, which is located in Greenwich, England. It ranges from 0° at the Prime Meridian to 180° at the International Date Line.
The Prime Meridian passes through Greenwich, England. It is designated as 0 degrees longitude and all other meridians are measured in degrees east or west of it. The Prime Meridian was established for navigation and is the basis on which International time is kept.
The distance east or west from the Prime Meridian is measured in degrees, with 360 degrees in a full circle representing the Earth's circumference. The Prime Meridian itself is set at 0 degrees longitude, so any location east of it will have a positive longitude value, while any location west of it will have a negative longitude value.
Longitude is measured in degrees east or west of the Prime Meridian, which is the starting point for the Earth's longitudinal coordinate system. Longitude lines run north-south and indicate positions to the east or west of the Prime Meridian, which passes through Greenwich, England.