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100th meridian west

Line of longitude west of the Greenwich Meridian

Top 10 100th meridian west related articles
1 Prime meridian
A prime meridian is the meridian in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian form a great circle. This great circle divides a spheroid into two hemispheres. If one uses directions of East and West from a defined prime meridian, then they can be called the Eastern Hemisphere and the Western Hemisphere.More
2 Greenwich
Greenwich is a town in south-east London, England, centred 5.5 miles (8.9 km) east-southeast of Charing Cross and located in the historic county of Kent.More
3 Longitude
Longitude, is a geographic coordinate that specifies the east–west position of a point on the Earth's surface, or the surface of a celestial body. It is an angular measurement, usually expressed in degrees and denoted by the Greek letter lambda (λ). Meridians connect points with the same longitude. The prime meridian, which passes near the Royal Observatory, Greenwich, England, is defined as 0° longitude by convention. Positive longitudes are east of the prime meridian, and negative ones are west.More
4 North Pole
The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. It is called the True North Pole to distinguish from the Magnetic North Pole.More
5 Arctic Ocean
The Arctic Ocean is the smallest and shallowest of the world's five major oceans. It spans an area of approximately 14,060,000 km2 and is also known as the coldest of all the oceans. The International Hydrographic Organization (IHO) recognizes it as an ocean, although some oceanographers call it the Arctic Mediterranean Sea. It is sometimes classified as an estuary of the Atlantic Ocean, and it is also seen as the northernmost part of the all-encompassing World Ocean.More
6 North America
North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere. It can also be described as a northern subcontinent of the Americas. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the west and south by the Pacific Ocean. However, Greenland, because it is on the North American Tectonic Plate, is often included as part of North America geographically.More
7 Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean in the south and is bounded by the continents of Asia and Australia in the west and the Americas in the east.More
8 Southern Ocean
The Southern Ocean, also known as the Antarctic Ocean or the Austral Ocean, comprises the southernmost waters of the World Ocean, generally taken to be south of 60° S latitude and encircling Antarctica. As such, it is regarded as the second-smallest of the five principal oceanic divisions: smaller than the Pacific, Atlantic, and Indian oceans but larger than the Arctic Ocean. Over the past 30 years, the Southern Ocean has been subject to rapid climate change, which has led to changes in the marine ecosystem.More
9 Antarctica
Antarctica is Earth's southernmost continent. It contains the geographic South Pole and is situated in the Antarctic region of the Southern Hemisphere, almost entirely south of the Antarctic Circle, and is surrounded by the Southern Ocean. At 14,200,000 square kilometres, it is the fifth-largest continent and nearly twice the size of Australia. At 0.00008 people per square kilometre, it is by far the least densely populated continent. About 98% of Antarctica is covered by ice that averages 1.9 km in thickness, which extends to all but the northernmost reaches of the Antarctic Peninsula.More
10 South Pole
The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where Earth's axis of rotation intersects its surface. It is the southernmost point on the surface of Earth and lies on the opposite side of Earth from the North Pole.More
100°
100th meridian west
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The meridian 100° west of the Prime Meridian of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole. The 100th meridian west forms a great circle with the 80th meridian east.

In the United States, this meridian roughly marks the boundary between the semi-arid climate in the west and the humid continental and humid subtropical climates in the east and is used as shorthand to refer to that arid-humid boundary.

100th meridian west Intro articles: 5
1 Great circle
A great circle, also known as an orthodrome, of a sphere is the intersection of the sphere and a plane that passes through the center point of the sphere. A great circle is the largest circle that can be drawn on any given sphere. Any diameter of any great circle coincides with a diameter of the sphere, and therefore all great circles have the same center and circumference as each other. This special case of a circle of a sphere is in opposition to a small circle, that is, the intersection of the sphere and a plane that does not pass through the center. Every circle in Euclidean 3-space is a great circle of exactly one sphere.More
2 80th meridian east
The meridian 80° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole.More
3 Semi-arid climate
A semi-arid climate, semi-desert climate, or steppe climate is the climate of a region that receives precipitation below potential evapotranspiration, but not as low as a desert climate. There are different kinds of semi-arid climates, depending on variables such as temperature, and they give rise to different biomes.More
4 Humid continental climate
A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by four distinct seasons and large seasonal temperature differences, with warm to hot summers and cold winters. Precipitation is usually distributed throughout the year. The definition of this climate regarding temperature is as follows: the mean temperature of the coldest month must be below −3 °C (26.6 °F) and there must be at least four months whose mean temperatures are at or above 10 °C (50 °F). In addition, the location in question must not be semi-arid or arid. The Dfb, Dwb and Dsb subtypes are also known as hemiboreal.More
5 Humid subtropical climate
A humid subtropical climate is a zone of climate characterized by hot and humid summers, and cold to mild winters. These climates normally lie on the southeast side of all continents, generally between latitudes 25° and 40° and are located poleward from adjacent tropical climates. It is also known as warm temperate climate.More

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 100th meridian west passes through:

Co-ordinates Country, territory or sea Notes
90°0′N 100°0′W / 90.000°N 100.000°W / 90.000; -100.000 (Arctic Ocean) Arctic Ocean
80°6′N 100°0′W / 80.100°N 100.000°W / 80.100; -100.000 (Canada)  Canada Nunavut — Meighen Island
79°52′N 100°0′W / 79.867°N 100.000°W / 79.867; -100.000 (Peary Channel) Peary Channel
78°44′N 100°0′W / 78.733°N 100.000°W / 78.733; -100.000 (Canada)  Canada Nunavut — Ellef Ringnes Island
77°48′N 100°0′W / 77.800°N 100.000°W / 77.800; -100.000 Unnamed waterbody
76°45′N 100°0′W / 76.750°N 100.000°W / 76.750; -100.000 (Canada)  Canada Nunavut — Berkeley Islands and Bathurst Island
74°59′N 100°0′W / 74.983°N 100.000°W / 74.983; -100.000 (Parry Channel) Parry Channel
73°57′N 100°0′W / 73.950°N 100.000°W / 73.950; -100.000 (Canada)  Canada Nunavut — Prince of Wales Island
71°52′N 100°0′W / 71.867°N 100.000°W / 71.867; -100.000 (M'Clintock Channel) M'Clintock Channel
70°35′N 100°0′W / 70.583°N 100.000°W / 70.583; -100.000 (Larsen Sound) Larsen Sound Passing just east of Gateshead Island, Nunavut,  Canada (at 70°35′N 100°9′W / 70.583°N 100.150°W / 70.583; -100.150 (Gateshead Island))
69°58′N 100°0′W / 69.967°N 100.000°W / 69.967; -100.000 (Victoria Strait) Victoria Strait
69°3′N 100°0′W / 69.050°N 100.000°W / 69.050; -100.000 (Canada)  Canada Nunavut — Royal Geographical Society Islands
68°57′N 100°0′W / 68.950°N 100.000°W / 68.950; -100.000 (Queen Maud Gulf) Queen Maud Gulf Passing just east of Hat Island, Nunavut,  Canada (at 68°18′N 100°2′W / 68.300°N 100.033°W / 68.300; -100.033 (Hat Island))
67°50′N 100°0′W / 67.833°N 100.000°W / 67.833; -100.000 (Canada)  Canada Nunavut
Manitoba — from 60°0′N 100°0′W / 60.000°N 100.000°W / 60.000; -100.000 (Manitoba), passing just west of Brandon
49°0′N 100°0′W / 49.000°N 100.000°W / 49.000; -100.000 (United States (North Dakota))  United States North Dakota
South Dakota — from 45°56′N 100°0′W / 45.933°N 100.000°W / 45.933; -100.000 (South Dakota)
Nebraska — from 43°0′N 100°0′W / 43.000°N 100.000°W / 43.000; -100.000 (Nebraska)
Kansas — from 40°0′N 100°0′W / 40.000°N 100.000°W / 40.000; -100.000 (Kansas)
Oklahoma — from 37°0′N 100°0′W / 37.000°N 100.000°W / 37.000; -100.000 (Oklahoma)
Texas / Oklahoma border — from 36°30′N 100°0′W / 36.500°N 100.000°W / 36.500; -100.000 (Texas / Oklahoma border)
Texas — from 34°34′N 100°0′W / 34.567°N 100.000°W / 34.567; -100.000 (Texas)
28°0′N 100°0′W / 28.000°N 100.000°W / 28.000; -100.000 (Mexico)  Mexico Coahuila
Nuevo León — from 27°37′N 100°0′W / 27.617°N 100.000°W / 27.617; -100.000 (Nuevo León)
Tamaulipas — from 23°24′N 100°0′W / 23.400°N 100.000°W / 23.400; -100.000 (Tamaulipas)
San Luis Potosí — from 23°10′N 100°0′W / 23.167°N 100.000°W / 23.167; -100.000 (San Luis Potosí)
Tamaulipas — from 22°54′N 100°0′W / 22.900°N 100.000°W / 22.900; -100.000 (Tamaulipas)
San Luis Potosí — from 22°50′N 100°0′W / 22.833°N 100.000°W / 22.833; -100.000 (San Luis Potosí)
Guanajuato — from 21°30′N 100°0′W / 21.500°N 100.000°W / 21.500; -100.000 (Guanajuato)
Querétaro — from 21°12′N 100°0′W / 21.200°N 100.000°W / 21.200; -100.000 (Querétaro)
Mexico State — from 20°6′N 100°0′W / 20.100°N 100.000°W / 20.100; -100.000 (Mexico State)
Guerrero — from 18°35′N 100°0′W / 18.583°N 100.000°W / 18.583; -100.000 (Guerro), passing just west of Acapulco
16°54′N 100°0′W / 16.900°N 100.000°W / 16.900; -100.000 (Pacific Ocean) Pacific Ocean
60°0′S 100°0′W / 60.000°S 100.000°W / -60.000; -100.000 (Southern Ocean) Southern Ocean
71°55′S 100°0′W / 71.917°S 100.000°W / -71.917; -100.000 (Antarctica) Antarctica Unclaimed territory

100th meridian west From Pole to Pole articles: 36
1 Canada
Canada is a country in the northern part of North America. Its ten provinces and three territories extend from the Atlantic to the Pacific and northward into the Arctic Ocean, covering 9.98 million square kilometres, making it the world's second-largest country by total area. Its southern and western border with the United States, stretching 8,891 kilometres (5,525 mi), is the world's longest bi-national land border. Canada's capital is Ottawa, and its three largest metropolitan areas are Toronto, Montreal, and Vancouver.More
2 Nunavut
Nunavut is the newest, largest, and most northerly territory of Canada. It was separated officially from the Northwest Territories on April 1, 1999, via the Nunavut Act and the Nunavut Land Claims Agreement Act, though the boundaries had been drawn in 1993. The creation of Nunavut resulted in the first major change to Canada's political map since incorporating the province of Newfoundland in 1949.More
3 Meighen Island
Meighen Island is an uninhabited member of the Queen Elizabeth Islands, part of the Canadian Arctic Archipelago, in the Qikiqtaaluk Region of Nunavut, Canada.More
4 Peary Channel
The Peary Channel is a waterway in the territory of Nunavut. It is an arm of the Arctic Ocean, and it spreads southeast between Meighen Island to the north, Axel Heiberg Island to the east, Amund Ringnes Island to the south, and Ellef Ringnes Island to the west. The channel is approximately 193 km (120 mi) long and 97 km (60 mi) wide.More
5 Ellef Ringnes Island
Ellef Ringnes Island is one of the Sverdrup Islands in Qikiqtaaluk Region, Nunavut, Canada. A member of the Queen Elizabeth Islands and Canadian Arctic Archipelago, it is located in the Arctic Ocean, east of Borden Island, and west of Amund Ringnes Island. It has an area of 11,295 km2 (4,361 sq mi), making it the 69th largest island in the world and Canada's 16th largest island. Its highest mount is 260 m (850 ft).More
6 Berkeley Islands
The Berkeley Islands (formerly Berkeley Group are an uninhabited island group in the Qikiqtaaluk Region of northern Canada's territory of Nunavut. They are located at the head of Young Inlet off northern Bathurst Island. The Berkeley Group is part of the Canadian Arctic Archipelago and is a member of the Parry Islands subgroup. It is composed of the Hosken Islands, as well as Allard Island, Harwood Island, Ricards Island, Seymour Island, and Sherard Osborn Island. It is named in honor of Maurice Berkeley, 1st Baron FitzHardinge, Royal Navy First Sea Lord.More
7 Bathurst Island (Nunavut)
Bathurst Island is one of the Queen Elizabeth Islands in Nunavut, Canada. It is a member of the Canadian Arctic Archipelago. The area of the island is estimated at 16,042 km2 (6,194 sq mi), 115 to 117 mi long and from 63 mi (101 km) to 72 mi (116 km) to 92.9 mi (149.5 km) wide, making it the 54th largest island in the world and Canada's 13th largest island. It is uninhabited.More
8 Parry Channel
The Parry Channel is a natural waterway through the central Canadian Arctic Archipelago. Its eastern two-thirds lies in the territory of Nunavut, while its western third lies in the Northwest Territories. It runs east to west, connecting Baffin Bay in the east with the Beaufort Sea in the west. Its eastern end is the only practical entrance to the Northwest Passage. Its western end would be a natural exit from the archipelago were it not filled with ice. The channel separates the Queen Elizabeth Islands to the north from the rest of Nunavut.More
9 Prince of Wales Island (Nunavut)
One of the larger members of the Canadian Arctic Archipelago, Prince of Wales Island is an Arctic island in Nunavut, Canada, lying between Victoria Island and Somerset Island and south of the Queen Elizabeth Islands.More
10 M'Clintock Channel

M'Clintock Channel is located in the territory of Nunavut, Canada. The channel, an arm of the Arctic Ocean, divides Victoria Island from Prince of Wales Island. This channel is named after Sir Francis McClintock, an Irish explorer in the British Royal Navy, famous for his Canadian Arctic explorations. The channel is 270 km (170 mi) long, and between 105 to 209 km wide, making it one of the largest channels in the Arctic Archipelago.More
11 Larsen Sound
Larsen Sound is an Arctic waterway in the Kitikmeot Region, Nunavut, Canada.More
12 Umingmalik
Umingmalik formerly Gateshead Island is an island located in the Kitikmeot Region of Nunavut, Canada. Located in M'Clintock Channel, the area of Gateshead Island is around 220 km2 (85 sq mi). It is an important polar bear denning area.More
13 Victoria Strait
Victoria Strait is a strait in northern Canada that lies in Nunavut off the mainland in the Arctic Ocean. It is between Victoria Island to the west and King William Island to the east. From the north, the strait links the M'Clintock Channel and the Larsen Sound with the Queen Maud Gulf to the south. The strait is about 160 km (100 mi) long and anywhere from 80 to 130 km wide.More
14 Royal Geographical Society Islands
The Royal Geographical Society Islands formerly the Royal Geographical Society Group are a group of islands lying west of King William Island in Victoria Strait, within the Queen Maud Gulf, in the north Canadian territory of Nunavut.More
15 Queen Maud Gulf
Queen Maud Gulf lies between the northern coast of the mainland and the southeastern corner of Victoria Island in Nunavut, Canada. At its western end lies Cambridge Bay, leading to Dease Strait; to the east lies Simpson Strait; and to the north, Victoria Strait.More
16 Putulik
Putulik formerly Hat Island is a small uninhabited island located in the Kitikmeot Region of Nunavut, Canada. The island is situated in Victoria Strait approximately 110 km (68 mi) southeast of Victoria Island and 80 km (50 mi) southwest of King William Island. The Requisite Channel separates Hat Island from Amundsen Island, the larger of the Nordenskiöld Islands.More
17 Manitoba
Manitoba is a province of Canada at the longitudinal centre of the country. It is Canada's fifth-most populous province, with a population of 1,278,365 as of 2016. The easternmost of the three prairie provinces, Manitoba covers 649,950 square kilometres (250,900 sq mi) of widely varied landscape, from arctic tundra and the Hudson Bay coastline in the north to dense boreal forest, large freshwater lakes, and prairie farmland in the central and southern regions. Manitoba is bordered by the provinces of Ontario to the east and Saskatchewan to the west, the territories of Nunavut to the north, and Northwest Territories to the northwest, Hudson Bay to the northeast, and the U.S. states of North Dakota and Minnesota to the south.More
18 Brandon, Manitoba
Brandon is the second-largest city in the province of Manitoba, Canada. It is located in the southwestern corner of the province on the banks of the Assiniboine River, approximately 214 km (133 mi) west of the provincial capital, Winnipeg, and 120 km (75 mi) east of the Saskatchewan border. Brandon covers an area of 77.41 km2 (29.89 sq mi) and has a population of 48,859, while its census metropolitan area has a population of 58,003. It is the primary hub of trade and commerce for the Westman region as well as parts of southeastern Saskatchewan and northern North Dakota, an area with a combined population of over 180,000 people.More
19 United States
The United States of America (USA), commonly known as the United States or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major self-governing territories, 326 Indian reservations, and some minor possessions. At 3.8 million square miles, it is the world's third- or fourth-largest country by total area. With a population of more than 328 million people, it is the third most populous country in the world. The national capital is Washington, D.C., and the most populous city is New York City.More
20 North Dakota
North Dakota is a state in the Upper Midwest region of the United States. It is named after the Lakota and Dakota Sioux Native American tribes, who comprise a large portion of the population and historically dominated the territory. It is the nineteenth largest in area, the fourth least populous, and the fourth most sparsely populated of the 50 states. Its capital is Bismarck, and its largest city is Fargo.More
21 South Dakota
South Dakota is a U.S. state in the Upper Midwest region of the United States. It is named after the Lakota and Dakota Sioux Native American tribes, who comprise a large portion of the population and historically dominated the territory. South Dakota is the seventeenth largest by area, but the 5th least populous, and the 5th least densely populated of the 50 United States. As the southern part of the former Dakota Territory, South Dakota became a state on November 2, 1889, simultaneously with North Dakota. It is either the 39th or 40th state admitted to the union. President Benjamin Harrison shuffled the statehood papers before signing them so that no one could tell which became a state first. Pierre is the state capital and Sioux Falls, with a population of about 187,200, is South Dakota's largest city.More
22 Nebraska
Nebraska is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the southwest; and Wyoming to the west. It is the only triply landlocked U.S. state.More
23 Kansas
Kansas is a state in the center of the United States. Its capital is Topeka and its largest city is Wichita. Kansas is bordered by Nebraska to the north; Missouri to the east; Oklahoma to the south; and Colorado to the west. Kansas is named after the Kansas River, which in turn was named after the Kansa Native Americans who lived along its banks. The tribe's name is often said to mean "people of the (south) wind" although this was probably not the term's original meaning. For thousands of years, what is now Kansas was home to numerous and diverse Native American tribes. Tribes in the eastern part of the state generally lived in villages along the river valleys. Tribes in the western part of the state were semi-nomadic and hunted large herds of bison.More
24 Oklahoma
Oklahoma is a state in the South Central region of the United States, bordered by the state of Texas on the south and west, Kansas on the north, Missouri on the northeast, Arkansas on the east, New Mexico on the west, and Colorado on the northwest. Partially in the western extreme of the Upland South, it is the 20th-most extensive and the 28th-most populous of the 50 United States. Its residents are known as Oklahomans, and its capital and largest city is Oklahoma City.More
25 Texas
Texas is a state in the South Central region of the United States. It is the second largest U.S. state by both area and population. Texas shares borders with the states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the south and southwest, and has a coastline with the Gulf of Mexico to the southeast.More
26 Mexico
Mexico, officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatemala, Belize, and the Caribbean Sea; and to the east by the Gulf of Mexico. Mexico covers 1,972,550 square kilometers (761,610 sq mi), making it the world's 13th-largest country by area; with approximately 126,014,024 inhabitants, it is 10th-most-populous country and most Spanish-speakers. Mexico is organized as a federation comprising 31 states and Mexico City, its capital and largest metropolis. Other major urban areas include Guadalajara, Monterrey, Puebla, Toluca, Tijuana, Ciudad Juárez, and León.More
27 Coahuila
Coahuila, formally Coahuila de Zaragoza, officially the Free and Sovereign State of Coahuila de Zaragoza, is one of the 32 states of Mexico.More
28 Nuevo León
Nuevo León, officially the Free and Sovereign State of Nuevo León, is one of the 32 states which comprise the Federal Entities of Mexico. It is divided into 51 municipalities and its capital city is Monterrey.More
29 Tamaulipas
Tamaulipas, officially the Free and Sovereign State of Tamaulipas, is one of the 32 states which comprise the Federal Entities of Mexico. It is divided into 43 municipalities and its capital city is Ciudad Victoria.More
30 San Luis Potosí
San Luis Potosí, officially the Free and Sovereign State of San Luis Potosí, is one of the 32 states which comprise the Federal Entities of Mexico. It is divided in 58 municipalities and its capital city is San Luis Potosí City.More
31 Guanajuato
Guanajuato, officially the Free and Sovereign State of Guanajuato, is one of the 32 states that make up the Federal Entities of Mexico. It is divided into 46 municipalities and its capital city is Guanajuato. The state's largest city is León.More
32 Querétaro
Querétaro, formally Querétaro de Arteaga, officially the Free and Sovereign State of Querétaro de Arteaga ,), is one of the 32 federal entities of Mexico. It is divided into 18 municipalities. Its capital city is Santiago de Querétaro. It is located in North-Central Mexico, in a region known as Bajío. It is bordered by the states of San Luis Potosí to the north, Guanajuato to the west, Hidalgo to the east, México to the southeast and Michoacán to the southwest.More
33 State of Mexico
The State of Mexico, officially the Free and Sovereign State of Mexico, is one of the 32 federal entities of Mexico. It is the most populous, as well as the most densely populated state. It is divided into 125 municipalities and its capital city is Toluca de Lerdo.More
34 Guerrero
Guerrero, officially the Free and Sovereign State of Guerrero, is one of the 32 states which comprise the 32 Federal Entities of Mexico. It is divided in 81 municipalities and its capital city is Chilpancingo and its largest city is Acapulco. It is located in Southwestern Mexico. It is bordered by the states of Michoacán to the north and west, the State of Mexico and Morelos to the north, Puebla to the northeast and Oaxaca to the east. In addition to the capital city, the state's largest cities include Acapulco, Petatlán, Ciudad Altamirano, Taxco, Iguala, Ixtapa, Zihuatanejo, and Santo Domingo. Today, it is home to a number of indigenous communities, including the Nahuas, Mixtecs, Tlapanecs, Amuzgos, and formerly Cuitlatecs. It is also home to communities of Afro-Mexicans in the Costa Chica region.More
35 Acapulco
Acapulco de Juárez, commonly called Acapulco, is a city and major seaport in the state of Guerrero on the Pacific coast of Mexico, 380 kilometres (240 mi) south of Mexico City. Acapulco is located on a deep, semicircular bay and has been a port since the early colonial period of Mexico's history. It is a port of call for shipping and cruise lines running between Panama and San Francisco, California, United States. The city of Acapulco is the largest in the state, far larger than the state capital Chilpancingo. Acapulco is also Mexico's largest beach and balneario resort city.More
36 Territorial claims in Antarctica
There are seven sovereign states who have made eight territorial claims in Antarctica: Argentina, Australia, Chile, France, New Zealand, Norway, and the United Kingdom. These countries have tended to place their Antarctic scientific observation and study facilities within their respective claimed territories; however, a number of such facilities are located outside of the area claimed by their respective countries of operation, and countries without claims such as India, Italy, Russia, Pakistan, Ukraine and the United States have constructed research facilities within the areas claimed by other countries.More

United States

Part of the border between Texas and Oklahoma is defined by the 100th meridian west.
Directors of the Union Pacific Railroad gather on the 100th meridian, which later became Cozad, Nebraska, about 250 miles (400 km) west of Omaha in the Nebraska Territory, in October 1866. The train in the background awaits the party of Eastern capitalists, newspapermen, and other prominent figures invited by the railroad executives.
Sign marking the 100th meridian in Cozad, Nebraska; photograph taken 138 years after the preceding photograph in October 2004

In the United States the meridian 100° west of Greenwich forms the eastern border of the Texas panhandle with Oklahoma (which traces its origin to the Adams-Onís Treaty in 1819 which settled the border between New Spain and the United States between the Red River and Arkansas River). Dodge City, Kansas lies exactly at the intersection of the Arkansas River and the 100th meridian.

In the central Great Plains, the meridian roughly marks the western boundary of the normal reach of moist air from the Gulf of Mexico, and the approximate boundary (although some areas do push the boundary slightly farther east) between the semi-arid climate to the west and the humid continental (north of about 37°N) and humid subtropical (south of about 37°N) climates to the east. The type of agriculture west of the meridian typically relies heavily on irrigation. Historically the meridian has often been taken as a rough boundary between the eastern and western United States. White settlement, spreading westward after the American Civil War, settled the area around this meridian during the 1870s.

A sign across U.S. Highway 30 in Cozad, Nebraska, marks the place where the 100th meridian intersects with the routes of the Oregon Trail, Pony Express, transcontinental railroad, and the Lincoln Highway.

100th meridian west United States articles: 18
1 Texas Panhandle
The Texas Panhandle is a region of the U.S. state of Texas consisting of the northernmost 26 counties in the state. The panhandle is a rectangular area bordered by New Mexico to the west and Oklahoma to the north and east. It is adjacent to the Oklahoma Panhandle. The Handbook of Texas defines the southern border of Swisher County as the southern boundary of the Texas Panhandle region.More
2 Adams–Onís Treaty
The Adams–Onís Treaty of 1819, also known as the Transcontinental Treaty, the Florida Purchase Treaty, or the Florida Treaty, was a treaty between the United States and Spain in 1819 that ceded Florida to the U.S. and defined the boundary between the U.S. and New Spain. It settled a standing border dispute between the two countries and was considered a triumph of American diplomacy. It came in the midst of increasing tensions related to Spain's territorial boundaries in North America against the United States and the United Kingdom in the aftermath of the American Revolution; it also came during the Latin American wars of independence.More
3 New Spain
New Spain, officially the Viceroyalty of New Spain, was an integral territorial entity of the Spanish Empire, established by Habsburg Spain during the Spanish colonization of the Americas. It covered a huge area that included much of North America, northern parts of South America and several Pacific Ocean archipelagos, namely the Philippines and Guam. It originated in 1521 after the fall of Tenochtitlan, the main event of the Spanish conquest. Officially created on 18 August 1521 as the Kingdom of New Spain, it later became the first of four viceroyalties Spain created in the Americas. Its first viceroy was Antonio de Mendoza y Pacheco and the capital, both of the kingdom and of the later viceroyalty, was Mexico City, established on the ancient city of Tenochtitlán following its conquest by Spain.More
4 Red River of the South
The Red River, or sometimes the Red River of the South, is a major river in the Southern United States. It was named for its reddish water color from passing through red-bed country in its watershed. It is one of several rivers with that name. Although once a tributary of the Mississippi River, the Red River is now a tributary of the Atchafalaya River, a distributary of the Mississippi that flows separately into the Gulf of Mexico. This confluence is connected to the Mississippi River by the Old River Control Structure.More
5 Arkansas River
The Arkansas River is a major tributary of the Mississippi River. It generally flows to the east and southeast as it traverses the U.S. states of Colorado, Kansas, Oklahoma, and Arkansas. The river's source basin lies in the western United States in Colorado, specifically the Arkansas River Valley. The headwaters derive from the snowpack in the Sawatch and Mosquito mountain ranges. It flows east into the Midwest via Kansas, and finally into the South through Oklahoma and Arkansas.More
6 Dodge City, Kansas
Dodge City is the county seat of Ford County, Kansas, United States, named after nearby Fort Dodge. The city is famous in American culture for its history as a wild frontier town of the Old West. As of the 2010 census, its population was 27,340.More
7 Great Plains
The Great Plains, sometimes simply "the Plains", is a broad expanse of flat land, much of it covered in prairie, steppe, and grassland, located in the interior of North America. It lies west of the Mississippi River tallgrass prairie in the United States and east of the Rocky Mountains in the U.S. and Canada.More
8 Gulf of Mexico
The Gulf of Mexico is an ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States; on the southwest and south by the Mexican states of Tamaulipas, Veracruz, Tabasco, Campeche, Yucatan, and Quintana Roo; and on the southeast by Cuba. The US states of Texas, Louisiana, Mississippi, Alabama, and Florida, which border the Gulf on the north, are often referred to as the "Third Coast" of the United States.More
9 37th parallel north
The 37th parallel north is a circle of latitude that is 37 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Africa, Asia, the Pacific Ocean, North America, and the Atlantic Ocean.More
10 Agriculture
Agriculture is the science, art and practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. The history of agriculture began thousands of years ago. After gathering wild grains beginning at least 105,000 years ago, nascent farmers began to plant them around 11,500 years ago. Pigs, sheep and cattle were domesticated over 10,000 years ago. Plants were independently cultivated in at least 11 regions of the world. Industrial agriculture based on large-scale monoculture in the twentieth century came to dominate agricultural output, though about 2 billion people still depended on subsistence agriculture.More
11 Irrigation
Irrigation is the artificial process of applying controlled amounts of water to land to assist in production of crops. Irrigation helps to grow agricultural crops, maintain landscapes, and revegetate disturbed soils in dry areas and during periods of less than average rainfall. Irrigation also has other uses in crop production, including frost protection, suppressing weed growth in grain fields and preventing soil consolidation. In contrast, agriculture that relies only on direct rainfall is referred to as rain-fed.More
12 American Civil War
The American Civil War was a civil war in the United States from 1861 to 1865, fought between northern states loyal to the Union and southern states that had seceded to form the Confederate States of America. The civil war began as a result of the unresolved controversy of the enslavement of black people in the southern states.More
13 U.S. Route 30
U.S. Route 30 or U.S. Highway 30 (US 30) is an east–west main route in the system of the United States Numbered Highways, with the highway traveling across the northern tier of the country. With a length of 3,073 miles (4,946 km), it is the third longest U.S. highway, after U.S. Route 20 (US 20) and U.S. Route 6. The western end of the highway is at US 101 in Astoria, Oregon; the eastern end is at Virginia Avenue, Absecon Boulevard, and Adriatic Avenue in Atlantic City, New Jersey. Despite long stretches of parallel and concurrent Interstate Highways, it has not been decommissioned unlike other long haul routes such as U.S. Route 66.More
14 Cozad, Nebraska
Cozad is a city in Dawson County, Nebraska, United States. The population was 3,977 at the 2010 census. The town is on the Great Plains of central Nebraska, along the Union Pacific Railroad and U.S. Route 30, just north of the Platte River. The 100th meridian, which roughly marks the eastward boundary of the arid plains, passes just west of the town as is marked nearby on a prominent sign across U.S. 30. In the early 1860s, the meridian was a stop along the Pony Express.More
15 Oregon Trail
The Oregon Trail was a 2,170-mile (3,490 km) east-west, large-wheeled wagon route and emigrant trail in the United States that connected the Missouri River to valleys in Oregon. The eastern part of the Oregon Trail spanned part of what is now the state of Kansas and nearly all of what are now the states of Nebraska and Wyoming. The western half of the trail spanned most of the current states of Idaho and Oregon.More
16 Pony Express
The Pony Express was a mail service delivering messages, newspapers, and mail using relays of horse-mounted riders that operated from April 3, 1860, to October 26, 1861, between Missouri and California in the United States of America.More
17 First transcontinental railroad
The first transcontinental railroad was a 1,912-mile (3,077 km) continuous railroad line constructed between 1863 and 1869 that connected the existing eastern U.S. rail network at Council Bluffs, Iowa with the Pacific coast at the Oakland Long Wharf on San Francisco Bay. The rail line was built by three private companies over public lands provided by extensive US land grants. Construction was financed by both state and US government subsidy bonds as well as by company issued mortgage bonds. The Western Pacific Railroad Company built 132 mi (212 km) of track from the road's western terminus at Alameda/Oakland to Sacramento, California. The Central Pacific Railroad Company of California (CPRR) constructed 690 mi (1,110 km) eastward from Sacramento to Promontory Summit, Utah Territory. The Union Pacific Railroad (UPRR) built 1,085 mi (1,746 km) from the road's eastern terminus at the Missouri River settlements of Council Bluffs and Omaha, Nebraska westward to Promontory Summit.More
18 Lincoln Highway
The Lincoln Highway is one of the earliest transcontinental highway routes for automobiles across the United States of America. Conceived in 1912 by Indiana entrepreneur Carl G. Fisher, and formally dedicated October 31, 1913, the Lincoln Highway ran coast-to-coast from Times Square in New York City west to Lincoln Park in San Francisco, originally through 13 states: New York, New Jersey, Pennsylvania, Ohio, Indiana, Illinois, Iowa, Nebraska, Colorado, Wyoming, Utah, Nevada, and California. In 1915, the "Colorado Loop" was removed, and in 1928, a realignment relocated the Lincoln Highway through the northern tip of West Virginia. Thus, there are a total of 14 states, 128 counties, and more than 700 cities, towns and villages through which the highway passed at some time in its history.More

In popular culture

The song "At the Hundredth Meridian" by The Tragically Hip is about the 100th meridian west, specifically in Canada, and how it has traditionally been considered "where the great plains begin."


Preceded by
99th meridian west 		100th meridian west
forms a great circle with
80th meridian east 		Succeeded by
101st meridian west

100th meridian west In popular culture articles: 4
1 At the Hundredth Meridian
"At the Hundredth Meridian" is a song by Canadian rock band The Tragically Hip. It was released in April 1993 as the fourth single from the band's 1992 album, Fully Completely. The song peaked at #18 on the Canadian RPM Singles chart. The song was also featured in the Due South episode "Heaven and Earth" in 1995.More
2 The Tragically Hip
The Tragically Hip, often referred to simply as the Hip, was a Canadian rock band formed in Kingston, Ontario, in 1984, consisting of vocalist Gord Downie, guitarist Paul Langlois, guitarist Rob Baker, bassist Gord Sinclair, and drummer Johnny Fay. They released 13 studio albums, one live album, one EP, and over 50 singles over a 33-year career. Nine of their albums have reached No. 1 on the Canadian charts. They have received numerous Canadian music awards, including 16 Juno Awards. Between 1996 and 2016, the Tragically Hip were the best-selling Canadian band in Canada and the fourth best-selling Canadian artist overall in Canada.More
3 99th meridian west
The meridian 99° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.More
4 101st meridian west
The meridian 101° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.More

See also

References