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The 180th meridian or antimeridian [1] is the meridian 180° both east and west of the prime meridian in a geographical coordinate system. The longitude at this line can be given as either east or west .
The International Date Line around the antimeridian (180° longitude).. The International Date Line (IDL) is the line extending between the South and North Poles that is the boundary between one calendar day and the next.
The United States and Kiribati have most of their territory east of the 180th meridian, in the Western Hemisphere, so they are considered to belong to the westernmost countries with their territory stretching as far to the west as beyond the 180th meridian into the Eastern Hemisphere. Conversely, Russia, New Zealand, and Fiji have most of their ...
A prime meridian is an arbitrarily chosen meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. On a spheroid, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great ellipse.
This meridian running through Greenwich, London, is defined as zero degrees longitude and could be called the least eastern and least western place in the world. The 180th meridian, on the opposite side of the globe, is therefore the easternmost and westernmost place in the world.
Since early September, they had logged nearly 12,000 miles aboard the Offshore Surveyor, crisscrossing the equator near the 180th meridian. Now a few days past Thanksgiving, the time had come to ...
Eastern Hemisphere: The half that lies east of the prime meridian and west of the 180th meridian. This hemisphere includes most of Africa, Europe, Asia, and Australia, as well as the Indian and Western Pacific Oceans. Western Hemisphere: The half that lies west of the prime meridian and east of the 180th meridian. This hemisphere includes North ...
Semisopochnoi's position in the Aleutian Island Chain gives it the distinction of being the Aleutian island most immediately West of the 180th meridian, giving it longitudinal coordinates in the Eastern Hemisphere. Therefore, some have argued it is technically the easternmost location in North America.