The meridian 45° west of Greenwich

Prime Meridian

The Prime Meridian is the meridian at which the longitude is defined to be 0°.The Prime Meridian and its opposite the 180th meridian , which the International Date Line generally follows, form a great circle that divides the Earth into the Eastern and Western Hemispheres.An international...

is a line of longitude

Longitude

Longitude is a geographic coordinate that specifies the east-west position of a point on the Earth's surface. It is an angular measurement, usually expressed in degrees, minutes and seconds, and denoted by the Greek letter lambda ....

 that extends from the North Pole

North Pole

The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is, subject to the caveats explained below, defined as the point in the northern hemisphere where the Earth's axis of rotation meets its surface...

 across the Arctic Ocean

Arctic Ocean

The Arctic Ocean, located in the Northern Hemisphere and mostly in the Arctic north polar region, is the smallest and shallowest of the world's five major oceanic divisions...

, Greenland

Greenland

Greenland is an autonomous country within the Kingdom of Denmark, located between the Arctic and Atlantic Oceans, east of the Canadian Arctic Archipelago. Though physiographically a part of the continent of North America, Greenland has been politically and culturally associated with Europe for...

, the Atlantic Ocean

Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

, South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

, the Southern Ocean

Southern Ocean

The Southern Ocean comprises the southernmost waters of the World Ocean, generally taken to be south of 60°S latitude and encircling Antarctica. It is usually regarded as the fourth-largest of the five principal oceanic divisions...

, and Antarctica to the South Pole

South Pole

The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where the Earth's axis of rotation intersects its surface. It is the southernmost point on the surface of the Earth and lies on the opposite side of the Earth from the North Pole...

.

In Greenland

Greenland

Greenland is an autonomous country within the Kingdom of Denmark, located between the Arctic and Atlantic Oceans, east of the Canadian Arctic Archipelago. Though physiographically a part of the continent of North America, Greenland has been politically and culturally associated with Europe for...

 the meridian defines the borders of Qaasuitsup

Qaasuitsup

Qaasuitsup is a new municipality in Greenland, operational from 1 January 2009. As of January 2010 its population is 17,749. The administrative center of the municipality is in Ilulissat...

 and Qeqqata

Qeqqata

Qeqqata is a new municipality in western Greenland, operational from 1 January 2009. The municipality was named after its location in central-western part of the country. Its population is 9,677 as of January 2010. The administrative center of the municipality is in Sisimiut...

 municipalities with the Sermersooq

Sermersooq

Sermersooq is a new municipality in Greenland, operational from 1 January 2009. It is home to Nuuk , the capital of Greenland, and is the most populous municipality in the country, with 21,232 inhabitants as of January 2010...

 municipality and the North East Greenland National Park.

The 45th meridian west forms a great circle

Great circle

A great circle, also known as a Riemannian circle, of a sphere is the intersection of the sphere and a plane which passes through the center point of the sphere, as opposed to a general circle of a sphere where the plane is not required to pass through the center...

 with the 135th meridian east

135th meridian east

The meridian 135° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, Australasia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole....

.

Starting at the North Pole

North Pole

The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is, subject to the caveats explained below, defined as the point in the northern hemisphere where the Earth's axis of rotation meets its surface...

 and heading south to the South Pole

South Pole

The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where the Earth's axis of rotation intersects its surface. It is the southernmost point on the surface of the Earth and lies on the opposite side of the Earth from the North Pole...

, the 45th meridian west passes through:

Co-ordinates	Country, territory or sea	Notes
90°0′N 45°0′W	Arctic Ocean Arctic Ocean The Arctic Ocean, located in the Northern Hemisphere and mostly in the Arctic north polar region, is the smallest and shallowest of the world's five major oceanic divisions...
83°41′N 45°0′W	Lincoln Sea Lincoln Sea Lincoln Sea is a body of water in the Arctic Ocean, stretching from Cape Columbia, Canada, in the west to Cape Morris Jesup, Greenland, in the east. The northern limit is defined as the great circle line between those two headlands. It is covered with sea ice throughout the year, the thickest sea...
83°8′N 45°0′W
82°51′N 45°0′W	J.P. Koch Fjord J.P. Koch Fjord J.P. Koch Fjord is a fjord in Peary Land, northern Greenland. To the west, the fjord opens into the Arctic Ocean....
82°46′N 45°0′W
82°36′N 45°0′W	Nordenskiöld Fjord Nordenskiöld Fjord Nordenskiöld Fjord is a fjord in Peary Land, northern Greenland. To the north-west the fjord opens into the Arctic Ocean. It separates the island of Nares Land from the mainland....
82°31′N 45°0′W		Island of Nares Land Nares Land Nares Land is an island in northern Greenland. Its area is 1466 km²....
82°3′N 45°0′W	Victoria Fjord Victoria Fjord Victoria Fjord or Victoria Inlet is a large fjord in northern Greenland. To the north-west the fjord opens into the Arctic Ocean....
81°46′N 45°0′W
60°5′N 45°0′W	Atlantic Ocean Atlantic Ocean The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...
1°17′S 45°0′W		Maranhão Maranhão Maranhão is a northeastern state of Brazil. To the north lies the Atlantic Ocean. Maranhão is neighbored by the states of Piauí, Tocantins and Pará. The people of Maranhão have a distinctive accent...  - island of Mirinzal Mirinzal Mirinzal is a town and municipality in the state of Maranhão in the Northeast region of Brazil.-References:...
1°24′S 45°0′W	Atlantic Ocean Atlantic Ocean The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...
1°30′S 45°0′W		Maranhão > Piauí Piauí Piauí is one of the states of Brazil, located in the northeastern part of the country.Piauí has the shortest coastline of any of the non-landlocked Brazilian states at 66 km , and the capital, Teresina, is the only state capital in the north east to be located inland... > Bahia Bahia Bahia is one of the 26 states of Brazil, and is located in the northeastern part of the country on the Atlantic coast. It is the fourth most populous Brazilian state after São Paulo, Minas Gerais and Rio de Janeiro, and the fifth-largest in size... > Minas Gerais Minas Gerais Minas Gerais is one of the 26 states of Brazil, of which it is the second most populous, the third richest, and the fourth largest in area. Minas Gerais is the Brazilian state with the largest number of Presidents of Brazil, the current one, Dilma Rousseff, being one of them. The capital is the... > São Paulo São Paulo (state) São Paulo is a state in Brazil. It is the major industrial and economic powerhouse of the Brazilian economy. Named after Saint Paul, São Paulo has the largest population, industrial complex, and economic production in the country. It is the richest state in Brazil...
23°24′S 45°0′W	Atlantic Ocean Atlantic Ocean The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...
60°0′S 45°0′W	Southern Ocean Southern Ocean The Southern Ocean comprises the southernmost waters of the World Ocean, generally taken to be south of 60°S latitude and encircling Antarctica. It is usually regarded as the fourth-largest of the five principal oceanic divisions...
60°40′S 45°0′W	South Orkney Islands South Orkney Islands The South Orkney Islands are a group of islands in the Southern Ocean, about north-east of the tip of the Antarctic Peninsula. They have a total area of about ....	Powell Island Powell Island Powell Island is a narrow island long and wide, lying between Coronation and Laurie Islands in the central part of the South Orkney Islands. Discovered on the occasion of the joint cruise by Capt. George Powell and Capt. Nathaniel Palmer in December 1821. It was correctly charted, though unnamed,...  - claimed by both (Argentine Antarctica Argentine Antarctica Argentine Antarctica is a sector of Antarctica claimed by Argentina as part of its national territory. The Argentine Antarctic region, consisting of the Antarctic Peninsula and a triangular section extending to the South Pole, is delimited by the 25° West and 74° West meridians and the 60° South... ) and (British Antarctic Territory British Antarctic Territory The British Antarctic Territory is a sector of Antarctica claimed by the United Kingdom as one of its 14 British Overseas Territories. It comprises the region south of 60°S latitude and between longitudes and , forming a wedge shape that extends to the South Pole... )
60°43′S 45°0′W	Southern Ocean Southern Ocean The Southern Ocean comprises the southernmost waters of the World Ocean, generally taken to be south of 60°S latitude and encircling Antarctica. It is usually regarded as the fourth-largest of the five principal oceanic divisions...
78°15′S 45°0′W	Antarctica	Claimed by both (Argentine Antarctica Argentine Antarctica Argentine Antarctica is a sector of Antarctica claimed by Argentina as part of its national territory. The Argentine Antarctic region, consisting of the Antarctic Peninsula and a triangular section extending to the South Pole, is delimited by the 25° West and 74° West meridians and the 60° South... ) and (British Antarctic Territory British Antarctic Territory The British Antarctic Territory is a sector of Antarctica claimed by the United Kingdom as one of its 14 British Overseas Territories. It comprises the region south of 60°S latitude and between longitudes and , forming a wedge shape that extends to the South Pole... )

See also

• 44th meridian west
  44th meridian west
  The meridian 44° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, the Atlantic Ocean, South America, the Southern Ocean, and Antarctica to the South Pole....
  
  
• 46th meridian west
  46th meridian west
  The meridian 46° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, the Atlantic Ocean, South America, the Southern Ocean, and Antarctica to the South Pole....