(secondary coordinates) The 180th meridian or antimeridian is the meridian 180° both east and west of the prime meridian in a geographical coordinate...

longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle. This great...

90th meridian east, located midway between the Prime meridian and the 180th meridian; thus, the center of the Western Hemisphere is on this meridian. In...

Earth that lies west of the Prime Meridian—which crosses Greenwich, London, England—and east of the 180th meridian. The other half is called the Eastern...

same amount. The 180th meridian (the meridian at 180° both east and west of the Prime Meridian) is opposite the IERS Reference Meridian and forms a great...

Bouvet Island in the South Atlantic) 180th meridian Prime meridian United Kingdom Ordnance Survey Zero Meridian Voting took place on 13 October and the...

meridian. The 90th meridian east forms a great circle with the 90th meridian west. This meridian is halfway between the Prime meridian and the 180th meridian...

country's territory is to the 180th meridian. Russia, Fiji, and Antarctica are notable exceptions because the 180th meridian passes through them. Therefore...

ranked. There are five countries with territory on both sides of the 180th meridian, and thus can be said to be both the westernmost and easternmost countries:...

lying west of the 180th meridian, Guam, the Northern Mariana Islands, and Wake Island, most of the country lies east of the 180th meridian. Kiribati, passing...

Pole. The 135th meridian east forms a great circle with the 45th meridian west, meaning it is a quarter away from the 180th meridian and 3 quarters from...

are limited to the north of the equator between the 100th meridian east and the 180th meridian (aka Prime Antimeridian). Tropical cyclones portal Tropical...

to the Pacific Ocean to the north of the equator between 100°E and 180th meridian. Within the northwestern Pacific Ocean, there are two separate agencies...

at the prime meridian. The Golden Shellback for maritime personnel who have crossed the point where the Equator crosses the 180th meridian. The Top Secret...

173°11′10″E / 52.84639°N 173.18611°E / 52.84639; 173.18611, opposite the 180th meridian from the rest of the United States. After the Japanese invasion of Attu...

the Chukchi Sea and East Siberian Sea, the island lies astride the 180th meridian. The International Date Line is therefore displaced eastwards at this...

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...

northernmost, westernmost, and easternmost (the Aleutian Islands cross the 180th meridian into the eastern hemisphere) state in the United States. It borders...

June solstice, and exactly 45.0° at either equinox. Starting at the Prime Meridian and heading eastwards, the parallel 45° north passes through: In Europe...

meridian east. Starting at the North Pole and heading south to the South Pole, the 179th meridian west passes through: 178th meridian west 180th meridian...

continuous path) — Cape Dezhnev, Russia Easternmost point (by longitude) — 180th meridian, Russia Northernmost Point — Cape Chelyuskin, Russia Southernmost Point...

equator and the 180th meridian, the International Date Line goes around Kiribati and swings far to the east, almost reaching the 150°W meridian. This was the...

off the coast of Attu to the west, but because both sit west of the 180th meridian, these two are at times viewed as the easternmost points of the United...

north is arbitrarily defined as being along the prime meridian in the Antarctic and the 180th meridian in the Arctic; thus, east and west on the grids when...

meridian west. Starting at the North Pole and heading south to the South Pole, the 179th meridian east passes through: 178th meridian east 180th meridian...

is limited to the north of the equator between the 100th meridian east and the 180th meridian. A violent typhoon is defined as a tropical cyclone that...

from GMT by a whole number of hours. A nautical date line follows the 180th meridian, bisecting one 15° gore into two 7.5° gores that differ from GMT by...

on the meridian of 180° longitude, roughly down the middle of the Pacific Ocean, and halfway around the world from the IERS Reference Meridian, the successor...

geographical poles and the equator, and halfway between the Prime Meridian and the 180th meridian. Both northern 45×90 points are located on land, while both...

is limited to the north of the equator between the 100th meridian east and the 180th meridian. The category of a very strong typhoon is defined as a tropical...