Quadripoint

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A quadripoint is a point on Earth where four distinct territories meet. [1] [2] The territories can be of different types, such as national and provincial. In North America, several such places are commonly known as Four Corners. Several examples exist throughout the world that use other names.

Contents

Usage

The word quadripoint does not appear in the Oxford English Dictionary or Merriam-Webster Online , though it has been used since 1964 by the Office of the Geographer of the United States Department of State. [3] and appears in the Encyclopædia Britannica , [4] as well as in the World Factbook articles on Botswana, Namibia, Zambia, and Zimbabwe, dating as far back as 1990. [5]

History

The borders of the historic condominium of Moresnet. Moresnet is colored blue, the Netherlands orange, Belgium yellow, and Prussia green. Moresnet.png
The borders of the historic condominium of Moresnet. Moresnet is colored blue, the Netherlands orange, Belgium yellow, and Prussia green.

An early instance of four political divisions meeting at a point is the Four Shire Stone in Moreton-in-Marsh, England (attested in the Domesday Book, 1086, [6] [7] and mentioned since 969 if not 772 [8] ); until 1931, it was the meeting point of the English counties of Gloucestershire, Oxfordshire, Warwickshire, and Worcestershire.

The earliest known quadripoint involving modern nation-states existed from 1817 to 1821 where the present Alabama–Mississippi state line crossed the 31st parallel border between Spain and the United States. During that period, the part of West Florida between the Pearl and Perdido rivers (which Spain still owned but the United States forcibly occupied and annexed in 1810 after belatedly claiming it as part of the Louisiana Territory purchased from France in 1803) was subdivided and allocated partly to the State of Mississippi and partly to the Territory (and later State) of Alabama. There resulted, at the intersection of demarcated boundaries, an international quadripoint of four territories, which in the United States were named (clockwise) Baldwin and Mobile counties of Alabama and Jackson and Greene counties of Mississippi, though Mobile and Jackson Counties were actually still Spanish. [9] [10]

Between 1839 and 1920, there was a quadripoint at the convergence of Belgium, Prussia/Germany, the Netherlands, and Moresnet at Vaalserberg. [11] Moresnet was never truly a country but rather only a neutral territory or condominium of the Netherlands and Prussia (originally), and of Belgium and Germany (ultimately). Subsequent political changes have restored its quadripartition along municipal lines (Kelmis, Plombieres within Belgium) since 1976 (though it has also enjoyed fivefold partition along municipal lines at times).

Four-nation quadripoints

Botswana–Namibia–Zambia–Zimbabwe

Map showing the Botswana-Namibia-Zambia-Zimbabwe purported quadripoint (circled) African quadripoint.svg
Map showing the Botswana–Namibia–Zambia–Zimbabwe purported quadripoint (circled)
Zambezi River at the junction of Namibia (top left), Zambia (top), Zimbabwe (bottom right), and Botswana (bottom left) Zambezi River borders of Namibia, Zambia, Zimbabwe & Botswana.jpg
Zambezi River at the junction of Namibia (top left), Zambia (top), Zimbabwe (bottom right), and Botswana (bottom left)

While some older sources claimed that a quadripoint existed in Africa, [12] where the borders of Namibia, Botswana, Zambia, and Zimbabwe come together at the confluence of the Cuando (also called Chobe) and Zambezi rivers, [13] [14] [15] it is now widely believed that instead, two separate tripoints exist about 100 to 150 metres (330–490 ft) apart.

In 1970, South Africa (which at the time occupied Namibia) informed Botswana that there was no common border between Botswana and Zambia, claiming that a quadripoint existed. As a result, South Africa claimed that the Kazungula Ferry, which links Botswana and Zambia at the quadripoint, was illegal. Botswana firmly rejected both claims. There was a confrontation and shots were fired at the ferry; [16] some years later, the Rhodesian Army attacked and sank the ferry, maintaining that it was serving military purposes. Ian Brownlie, who studied the case, wrote in 1979 that the possibility of a quadripoint could not be definitively ruled out at that time. [1]

In August 2007, the governments of Zambia and Botswana announced a deal to construct a bridge at the site to replace the ferry. [17] The existence of a short boundary of about 150 metres (490 ft) between Zambia and Botswana was agreed by all four states in the 2006–10 period, and is shown in the African Development Fund project map. [18] This matches the data kept by the Office of the Geographer under the U.S. Department of State.[ citation needed ] However, the Anglo-German agreement of 1890 stipulates that the thalweg junction of the Chobe and Zambezi, which today falls within the demarcated limits of Zimbabwe, is the eastward limit of the Caprivi Strip (in today's Namibia). [19] Moreover, it was reported in 2014 that Namibia actually granted Botswana and Zambia an easement to build their bridge across what all three parties concurred was Namibian territory. [20]

Cameroon–Chad–Nigeria–United Kingdom

A true four-country point did formerly exist in Africa for a period of eight months during 1960 and 1961, in southern Lake Chad, at the location of the present CameroonChadNigeria tripoint. Upon the 1 October 1960 independence of Nigeria, that borderpoint became common to the latter three countries and the territory of Northern Cameroons, which was still governed under United Nations mandate by the United Kingdom, until it was finally integrated into Nigeria on 1 June 1961. This is the only known quadricountry borderpoint not involving condominial territories.[ citation needed ]

Quadripoints within and between nations

A map of southeastern Nebraska, from about Gage County to Hall County, showing county lines in black and PLSS township lines in purple. In many parts of the United States county lines are based on PLSS townships and sections. There are occasional jogs in the grid, due to correction lines Nebraska-SE-counties-PLSS.png
A map of southeastern Nebraska, from about Gage County to Hall County, showing county lines in black and PLSS township lines in purple. In many parts of the United States county lines are based on PLSS townships and sections. There are occasional jogs in the grid, due to correction lines

Quadripoints can exist at the meeting of political subdivisions of any type or level. The most common are in the United States and Canada, where the grid-based Public Land Survey System (PLSS) and Dominion Land Surveys (DLS), respectively, resulted in a large number of quadripoints at the corners of survey units such as DLS townships, PLSS townships, sections, and various other gridded subdivisions. The borders of U.S. counties and towns are often defined by survey townships. There are dozens of quadripoints between U.S. counties, hundreds between U.S. municipalities, and indeed thousands (of usually bilateral ones) on the edges of checkerboard-patterned Indian reservations and other federally reserved territories. But of all the quadripoints that exist, the most noted are a few dozen that are situated on international borders, and about a dozen others involve primary national subdivisions (such as provinces or states).

Among the international quadripoints (examples below), a few general types can be distinguished. In the absence of four-country points, three-country quadripoints are perhaps most significant. These combine two divisions of one country with (one each of) two other countries. But there also exist merely binational quadripoints—of several varieties. Some of these combine two subdivisions of two countries, others three subdivisions of one country with (one of) another; while still others occur at points where international boundaries appear to touch or cross themselves—with or without subdivision—or where an international boundary appears to bifurcate around disputed territories.

Also below, by country, are some subnational quadripoints composed of subdivisions.

Algeria–Mali–Mauritania

Two districts of Adrar Province, Algeria—namely Bordj Badji Mokhtar and Reggane—meet the Tombouctou Cercle of Tombouctou Region, Mali, and the Bir Mogrein Department of Tiris Zemmour Region, Mauritania.

Andorra

In northern Andorra, the four parròquies or parishes of Canillo, Encamp, La Massana, and Ordino, meet at a quadripoint.[ citation needed ]

Argentina

The Argentine provinces of La Pampa, Río Negro, Mendoza, and Neuquén may meet at 37°34′44.3″S68°14′32.6″W / 37.578972°S 68.242389°W / -37.578972; -68.242389 . Río Negro has disputed this since a 1966 resurvey cast the exact boundary convergence into some doubt.[ citation needed ]

Austria–Germany

The summit of Sorgschrofen forms a quadripoint between two German and two Austrian municipalities, Pfronten and Bad Hindelang in Bavaria, Germany, and Schattwald and Jungholz in Tyrol, Austria, the Austrian municipality of Jungholz being connected to the rest of the territory of Austria just by the single point, according to the 1844 border treaty between the Kingdom of Bavaria and the Austrian Empire.

Bangladesh–India

The Bangladesh-India border formerly included nearly 200 enclaves. Almost all of these were extinguished by the Land Boundary Agreement between the two states, effective after 31 July 2015, which exchanged all first-order enclaves. The international boundary touched itself at one or possibly two locations shared by India (West Bengal state, Cooch Behar district) and Bangladesh (Rangpur Division, Lalmonirhat District). A confirmed instance occurred in Mathabhanga subdivision and a less definite one in Mekhliganj subdivision (of Cooch Behar), involving the Bara Saradubi enclave of Hatibandha thana and the Jote Nijjama enclave of Patgram thana (of Lalmonirhat), respectively; both were eliminated by the agreement. The international stature of these enclaves had been intermittent since Mughal times and was a result of the Radcliffe Award of 1947. [21] [22]

Belgium–Netherlands

The international boundaries in Baarle between Belgium (dark yellow) and Netherlands (pale yellow), with several enclaves and exclaves Baarle-Nassau - Baarle-Hertog-nl.png
The international boundaries in Baarle between Belgium (dark yellow) and Netherlands (pale yellow), with several enclaves and exclaves

The international boundary touches (or crosses) itself, without imparting political subdivision, within the commingled municipalities of Baarle-Nassau (North Brabant, Netherlands) and Baarle-Hertog (Antwerp, Belgium). The peculiar situation, which occurs at Baarle but once (at the touchpoint of Belgian enclaves H1 and H2), [23] has existed at least cadastrally since about 1198, but its current international distinction dates only from 1830. [24] [25]

Benin–Burkina Faso

Since 2009, Benin and Burkina Faso have jointly administered a neutral zone called Kourou or Koalou that lies tangent to their boundary junction with Togo, producing the sort of tricountry quadripoint that adjoined the defunct Moresnet neutral zone illustrated above.

Canada

The creation of the Canadian territory of Nunavut might have resulted in the creation of a quadripoint between the provinces of Saskatchewan and Manitoba and the territories of Nunavut and Northwest Territories (NWT). Nunavut was officially separated from the Northwest Territories in 1999, though the boundaries had been defined in 1993 by the Nunavut Act and the Nunavut Land Claims Agreement. Both documents define Nunavut's boundary as including the "intersection of 60°00'N latitude with 102°00'W longitude, being the intersection of the Manitoba, Northwest Territories and Saskatchewan borders". However, the northernmost point of the Manitoba–Saskatchewan border as surveyed is slightly off from 60° north 102° west, therefore the laws are not perfectly clear about whether the Nunavut–NWT boundary, which has not been surveyed, is to meet the others in a quadripoint or not. [26] [27] [n 1]

Canada–United States

Both of the only known international quadripoints in the Americas occur on the Canada–United States border along remote mountain crests. One, which joins the Canadian provinces of Alberta (Improvement District Number 4) and British Columbia (Regional District of East Kootenay) with the Montana counties of Flathead and Glacier where the 49th parallel crosses the Continental Divide also unites an international peace park comprising national parks of both countries (Waterton Lakes and Glacier, respectively). It has been a politically important and precisely stipulated international boundary point since 1818; has been monumented since 1876 (now by a hollow metallic obeliskoid marker numbered 272); and has maintained a quadripartite status since 1893. [30] [31] [32] [33]

The other of the pair occurs in the international boundary sector known as the Highlands, on the ridge separating the Gulf of Saint Lawrence watershed from the Gulf of Maine watershed, where three minor civil divisions of the state of Maine—namely Dennistown Plantation, Forsyth, and Sandy Bay Townships, all in Somerset County—meet Le Granit Regional County Municipality of the province of Quebec. This quadripoint, which was legally delimited in 1873 and validated in 1895, is marked (like all the corners of the minor civil divisions of Maine) by a brightly painted 8-foot wooden pole. [34] [35] [36] [37]

Colombia

There is a subnational quadripoint in Colombia at approximate coordinates 4°44′07″N73°03′04″W / 4.73528°N 73.05111°W / 4.73528; -73.05111 , at the confluence of the Upía and Guavio rivers, where the borders of the Boyacá, Casanare, Meta, and Cundinamarca departments come together.

Croatia

The summit of Risnjak mountain in Primorje-Gorski Kotar County is a meeting point of five municipalities: Čabar, Delnice, Lokve, Bakar and Čavle, making it a quintipoint.

The municipalities of Vrbanja, Drenovci, Bošnjaci and Nijemci in Vukovar-Srijem County meet at a quadripoint just south of the A3 motorway, near Spačva.

The municipalities of Magadenovac, Marijanci, Valpovo and Koška in Osijek-Baranja County meet at a quadripoint on the river Breznica.

The municipalities of Krapina, Mihovljan, Bedekovčina and Sveti Križ Začretje in Krapina-Zagorje County meet at a quadripoint just north of the village of Komor Začretski.

The municipalities of Čakovec, Sveti Juraj na Bregu, Selnica and Mursko Središće in Međimurje County share a quadripoint north of the village of Žiškovec.

Croatia–Hungary–Serbia

At a delimitation point determined partly following World War I and partly following World War II, and indirectly monumented by international pillars 415 and 420 on respective riverbanks, there is on the thalweg (center of downstream navigation channel) of the Danube a trinational quadripoint, where the Hungarian counties of Baranya and Bács-Kiskun meet the Croatian county of Osječko-Baranjska and the Serbian (Vojvodina) District of West Bačka (although Croatia continues to claim its former Yugoslav cadastral territory east of the Danube, leaving the quadripoint technically unsettled). [38] [39]

Dominican Republic–Haiti

On the border of the Dominican Republic and Haiti, there is a binational quadripoint where two departments of Haiti, Centre and Ouest, meet two provinces of the Dominican Republic, Elias Pina and Independencia, at the ridgeline of a feature that is called the Sierra de Neiba in the Dominican Republic and the Chaine du Trou de l'Eau in Haiti, and which a 19th-century communal boundary followed before the intersecting 20th-century international boundary was created. [40] As well, some 20 kilometres (12 mi) to the east along the same ridgeline, the same two Dominican provinces produce a subnational quadripoint where they meet two other Dominican provinces, Baoruco and San Juan.

Gabon

Four provinces (the primary subdivision) of Gabon, namely Moyen-Ogooué, Ngounie, Ogooué-Ivindo, and Ogooué-Lolo, meet at a quadripoint in La Lopé National Park (at roughly 0°45′00″S11°33′04″E / 0.750°S 11.551°E / -0.750; 11.551 (Gabonese provincial quadripoint) ). Moreover, at least one instance of four departments (the secondary subdivision), namely Haut-Ntem, Ivindo, Okano, and Woleu, also meet at a quadripoint.

Hungary–Slovakia

The border between Hungary and Slovakia most probably leads the world in international quadrimunicipal points with no fewer than five, but this border is also unique for hosting the only known pair of linked quadrimunicipal points in the world—which are shared in common by the towns of Skároš, Slovakia, and Füzér, Hungary, in conjunction with Trstené Pri Hornáde, Slovakia, and Hollóháza, Hungary, in one case, and Slanská Huta, Slovakia, and Pusztafalu, Hungary, in the other. All these towns are in either the Košice Okolie district of the Košice region of Slovakia or the Borsod-Abaúj-Zemplén county of Hungary.

Iraq–Saudi Arabia

From 1922 - 1981 Iraq and Saudi Arabia jointly administered a large neutral zone immediately west Kuwait, forming a distinctive diamond shape which create a quadripoint at the Kuwait border.

Jamaica

Simple map of Jamaica clearly showing the Trelawny-Manchester-Clarendon-Saint Ann quadripoint (centre-left) JamaicaOMC.png
Simple map of Jamaica clearly showing the Trelawny-Manchester-Clarendon-Saint Ann quadripoint (centre-left)

Four parishes of Jamaica, namely Clarendon, Manchester, Saint Ann, and Trelawny, meet at a quadripoint.

Kazakhstan–Russia

A quadripoint is created by Saratov Oblast, Samara Oblast, and Orenburg Oblast from the Russian side of the border and West Kazakhstan Region from the Kazakhstani side. [41]

Lithuania–Poland–Russia

At 54°21′52″N22°47′32″E / 54.36435°N 22.79228°E / 54.36435; 22.79228 , there is a trinational quadripoint: to the northwest is Russia (specifically the Russian exclave Kaliningrad Oblast); to the northeast Lithuania; and to the southwest and southeast two voivodeships (provinces) of Poland: Warmian-Masurian Voivodeship and Podlaskie Voivodeship. [42] The quadripoint exists thanks to the way the border between Poland and Russian SFSR was defined in 1945 by the Potsdam Agreement. The new border between Poland and the USSR bisected Germany's former province of East Prussia; the northern part became Kaliningrad Oblast, and most of the southern part is now Warmia-Masuria.[ citation needed ]

Mauritania

Four regions of Mauritania, namely Adrar, Brakna, Tagant, and Trarza, meet at a quadripoint formed by an intersection of non-cardinally oriented geodesic lines that define their borders.

Mexico

In Mexico, there is one precise quadripoint at 24°33′00″N100°48′00″W / 24.55000°N 100.80000°W / 24.55000; -100.80000 . The Mojonera de los cuatro estados ("Four State Boundary Stone") was built to mark the point where Coahuila, Nuevo Leon, San Luis Potosi, and Zacatecas states effectively meet. [43]

Norway–Sweden

On the border of Sweden and Norway, there is a binational quadripoint where two counties of Norway, Trøndelag and Nordland, meet two counties of Sweden, Västerbotten and Jämtland, at international boundary marker number 204 ( 65°7′8″N14°19′33″E / 65.11889°N 14.32583°E / 65.11889; 14.32583 ). [44] [45] Though the marker dates from 1760, the point became a quadripoint in the 19th century and became international upon the dissolution of Sweden and Norway in 1905. [46] [47]

Oman–Saudi Arabia–Yemen

Amid the Empty Quarter of Arabia—as trilaterally agreed and monumented in 2006 precisely at the intersection of the 19th parallel and 52nd meridian (datum uncertain)—Oman (governorate of Dhofar) and Saudi Arabia (province of Najran) meet Yemen (and its governorates of Al Mahrah and Hadramawt) in a tricountry quadripoint. [48] [49]

Poland–Slovakia

At a secondary summit of Pilsko Peak called Góra Pięciu Kopców, where there is situated a prominent turnpoint on the border of Poland and Slovakia that is evidently demarcated by a primary border marker numbered III/109, there lies a binational quadripoint at which the rural gmina or municipality of Jeleśnia in Żywiec County of the Silesian Voivodeship of Poland apparently meets three municipalities of Námestovo District of Žilina Region of Slovakia called, respectively, Mutne, Oravské Veselé, and Námestovo (although it is unclear if the last-mentioned is an outlier of the eponymous district seat or just an unorganized territory of the Námestovo District itself). [50]

Suriname

In the Coppename River, Suriname enjoys a quadripoint of the districts of Coronie, Para, Saramacca, and Sipaliwini.

Sweden

In 2007, the municipality of Heby was transferred to Uppsala County, causing Heby of Uppsala County to border the counties of Västmanland, Dalarna, and Gävleborg at the junction of Dalälven and Norrsundet in Färnebofjärden. This was previously a county-level tripoint when Heby was a part of Västmanland. The point forms approximate right angles, and is located on an island in the Dalälven river at 60°11′42″N16°42′17″E / 60.19500°N 16.70472°E / 60.19500; 16.70472 .

United Kingdom

Due to changes to the borders and numbers of administrative counties in the last century, no true county quadripoint remains in the United Kingdom, though there have been some historical shire/county quadripoints. The village of Four Marks in Hampshire is so named, because historically four adjoining tithings (or parishes) of Medstead, Ropley, Faringdon, and Chawton met there in a quadripoint.

United States

The boundary marker inscribed at the center of the Four Corners Monument, the only state quadripoint in the United States, where Arizona, Utah, Colorado, and New Mexico meet Fourcorners.jpg
The boundary marker inscribed at the center of the Four Corners Monument, the only state quadripoint in the United States, where Arizona, Utah, Colorado, and New Mexico meet

The Four Corners Monument is the only point in the United States where four states meet: Colorado, Utah, New Mexico, and Arizona meet at right angles. The United States first acquired the area now called Four Corners from Mexico after the Mexican–American War in 1848. In 1863 Congress created Arizona Territory from the western part of New Mexico Territory. The boundary was defined as a line running due south from the southwest corner of Colorado Territory, which had been created in 1861. By defining one boundary as starting at the corner of another, Congress ensured the eventual creation of four states meeting at a point, regardless of the inevitable errors of boundary surveying. [51] The monument is centered at 36°59′56.31532″N109°02′42.62019″W / 36.9989764778°N 109.0451722750°W / 36.9989764778; -109.0451722750 . [52]

Many county quadripoints exist in the United States, particularly in states like Iowa and Texas where large numbers of counties were drawn along rectilinear survey lines. [53] There exists one point at which five county boundaries meet in Florida (Glades, Hendry, Martin, Okeechobee and Palm Beach). [53]

Void or dispute-pendant quadripoints

A pair of conflicting territorial claims can give rise to a void or dispute-pendant quadripoint: of the territory in dispute and the adjacent undisputed territories of the claimants with a fourth territory (or void area) claimed by neither of them.

An international case of such a quadripoint on dry land can be inferred, if not actually found, in a remote area of the Nubian Desert involving both the Hala'ib Triangle and Bir Tawil (about midway between the River Nile and the Red Sea) where the long established but undemarcated international border along the 22nd parallel, as claimed by Egypt, is intersected by a similarly well established administrative boundary preferred and claimed by Sudan as the true international border. [54] [55]

Another occurrence—actually a pair of such quadripoints linked to an unclaimed area- is inferred where the southern end of the Alaska sector of the Canada–United States border aberrates into two crisscrossing versions or claim lines. These conflicting lines produce, besides two areas of overlapping claims, two small triangles of void or virtual high seas—one having two pendant quadripoints identifiable at fairly precise geocoordinates—as they lurch through the narrows of Dixon Entrance toward their still indefinite boundary termination in the true high seas of the Pacific. [56] [57]

Yet another quadripoint of this type exists on the disputed Thai–Cambodian boundary a short distance northeast of Preah Vihear Temple.

And finally, combining the only other two (of the seven known) unclaimed or void areas on Earth, is a seventh dispute-pendant quadripoint, at the South Pole. Being at once a simple bilateral quadripoint and a far more complicated intersection of claim limits (an elevenfold six-country point), the South Pole example combines two parcels of virgin unclaimed land with two parcels of Antarctic Treaty regulated territory (which have been variously claimed, disputed, recognized, ignored, disowned, and reclaimed as national sovereign territory by Argentina, Australia, Chile, France, the United Kingdom, and New Zealand, if not also Norway). But whatever the ultimate disposition of disputed national sovereignty, the intersection and quadripoint of two pristine and disputable territories endures. [58] [59] The void areas meet the polar quadripoint between the 90th and 150th meridian west longitude (Marie Byrd Land) and, again, between the 20th meridian west and 45th meridian east (this latter sector, of indefinite extent, owing to the Norwegian exclusion of the South Pole from Queen Maud Land), while sovereign or treaty-regulated areas converge at the polar quadripoint in the two intervals between the void areas.

Multipoints of greater numerical complexity

Quadripoints are exceptional and rare because borders and territories do not normally meet in groups of more than three (viz., at tripoints). Correspondingly and proportionally rarer are points of more than fourfold constituency. Only thirteen quinquepoints (or quintipoints), of various levels of geopolitical subdivisions, exist in the world. [53] For example, five counties of Florida, United States, meet in the middle of Lake Okeechobee, and the five parishes of Nevis, one of the two islands that make up St Kitts and Nevis, meet on Nevis Peak in the centre of the island. [53] Multipoints of greater than quintuple complexity are exceedingly rare.

Kuhankuono border marker Kuhankuono.JPG
Kuhankuono border marker

In Finland near Turku, the borders of six municipalities merge on the same sexapoint or sexipoint: Pöytyä, Aura, Turku, Rusko, Nousiainen, and Mynämäki meet on the Kuhankuono border marker in Kurjenrahka National Park. The oldest recorded mention of the point dates to 1381, and the number and identity of municipalities participating has varied.

Eight communities of three districts of Papua-New Guinea meet at a single point, at the summit of Mt. Taraka on Bougainville Island, in North Solomons province. The communities are Lato, Motuna-Huyono and Koraru (within Boku district); Makis, Konnou and Wisai (in Buin district); and Bakong and Bakada (in Kieta district). The resulting octopoint is thus a higher-level tripoint as well.

In the Philippines, an octopoint exists at the summit of Mayon Volcano, where eight municipalities in Albay meet. In the nearby province of Camarines Sur, the peak of Mount Isarog is a hexapoint.

In Northern Ireland, ten townlands meet at a decempoint or decipoint at the summit of Knocklayd (clearly shown by Ordnance Survey mapping at point 311518 436392). [60] [61] [62] The townlands are, clockwise from north, Broom-More, Tavnaghboy, Kilrobert, Clare Mountain, Aghaleck, Corvally, Essan, Cleggan, Stroan, and Tullaghore.

Map of municipalities in the province of Catania, Sicily, Italy Provincia di Catania colori.svg
Map of municipalities in the province of Catania, Sicily, Italy

Similarly in Italy, the borders of ten municipalities meet at an undecempoint or undecipoint, at the summit of Mount Etna. These municipalities are Adrano, Biancavilla, Belpasso, Bronte, Castiglione di Sicilia, Maletto, Nicolosi, Randazzo, Sant'Alfio, and Zafferana Etnea. The territory of Bronte touches the summit of Mount Etna from two sides, making this multipoint one of elevenfold complexity, and thus evidently the most complicated geopolitical multipoint anywhere, other than the South Pole discussed at #Void or dispute-pendant quadripoints above. [63] [53]

See also

Notes

  1. Although both the Nunavut Act and the Nunavut Land Claims Agreement state the intersection of 60°00'N latitude and 102°00'W longitude as the boundary between Manitoba, Saskatchewan, and the Northwest Territories, the actual, legal boundary point is marked by a survey monument boundary marker placed by the Manitoba Saskatchewan Boundary Commission in 1962. [28] According to Natural Resources Canada, Geodetic Survey Division, that monument's precise location is 59°59′57.98511″N102°0′27.24027″W / 59.9994403083°N 102.0075667417°W (NAD83), or about 400 metres (1,300 ft) west and slightly south of 60°N by 102°W. [29]

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Caprivi Strip Geographical area of north-eastern Namibia

The Caprivi Strip, also known simply as Caprivi, is a geographic salient protruding from the north-eastern corner of Namibia. It is surrounded by Botswana to the south and Angola and Zambia to the north. Namibia, Botswana and Zambia meet at a single point at the eastern tip of the Strip, which also comes within 150 m of Zimbabwe thus nearly forming a quadripoint. Botswana and Zambia share a 150 meter border at the crossing of Kazungula. The territory was acquired by the then German South West Africa in order to provide access to the Zambezi River and consequently a route to the east coast of the continent and German East Africa. The route was later found not to be navigable because about 65 kilometres east of the Caprivi Strip is Victoria Falls, one of the world's largest waterfalls.

Four Corners Only region in the United States where four states share a boundary point

The Four Corners is a region of the Southwestern United States consisting of the southwestern corner of Colorado, southeastern corner of Utah, northeastern corner of Arizona, and northwestern corner of New Mexico. The Four Corners area is named after the quadripoint at the intersection of approximately 37° north latitude with 109° 03' west longitude, where the boundaries of the four states meet, and are marked by the Four Corners Monument. It is the only location in the United States where four states meet. Most of the Four Corners region belongs to semi-autonomous Native American nations, the largest of which is the Navajo Nation, followed by Hopi, Ute, and Zuni tribal reserves and nations. The Four Corners region is part of a larger region known as the Colorado Plateau and is mostly rural, rugged, and arid. In addition to the monument, commonly visited areas within Four Corners include Monument Valley, Mesa Verde National Park, Chaco Canyon, Canyons of the Ancients National Monument and Canyon de Chelly National Monument. The most populous city in the Four Corners region is Farmington, New Mexico, followed by Durango, Colorado.

Census geographic units of Canada Term used in Canada

The census geographic units of Canada are the census subdivisions defined and used by Canada's federal government statistics bureau Statistics Canada to conduct the country's quinquennial census. These areas exist solely for the purposes of statistical analysis and presentation; they have no government of their own. They exist on four levels: the top-level (first-level) divisions are Canada's provinces and territories; these are divided into second-level census divisions, which in turn are divided into third-level census subdivisions and fourth-level dissemination areas.

Four corners (Canada) Quadripoint in Canada, between Manitoba, Saskatchewan, Northwest Territories and Nunavut

The four corners is a quadripoint near 60° N 102° W where four Canadian provinces or territories meet. These are the provinces of Manitoba and Saskatchewan and the territories of the Northwest Territories and Nunavut. It came into being with the creation of Nunavut on April 1, 1999.

Tripoint Geographical point at which the boundaries of three countries or subnational entities meet

A tripoint, trijunction, triple point, or tri-border area is a geographical point at which the boundaries of three countries or subnational entities meet. There are approximately 176 international tripoints. Nearly half are situated in rivers, lakes or seas. On dry land, the exact tripoints may be indicated by markers or pillars, and occasionally by larger monuments.

Kazungula Human settlement in Zambia

Kazungula is a small border town in Zambia, lying on the north bank of the Zambezi River about 70 kilometres (45 mi) west of Livingstone on the M10 Road.

Confluence Meeting of two or more bodies of flowing water

In geography, a confluence occurs where two or more flowing bodies of water join to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river ; or where two streams meet to become the source of a river of a new name ; or where two separated channels of a river rejoin at the downstream end.

Enclave and exclave Territory (or part of one) entirely surrounded by the territory of one other state

An enclave is a territory that is entirely surrounded by the territory of one other state or entity. Enclaves may also exist within territorial waters. Enclave is sometimes used improperly to denote a territory that is only partly surrounded by another state. The Vatican City and San Marino, both enclaved by Italy, and Lesotho, enclaved by South Africa, are completely enclaved sovereign states.

Boundary marker Physical marker that identifies a land boundary

A boundary marker, border marker, boundary stone, or border stone is a robust physical marker that identifies the start of a land boundary or the change in a boundary, especially a change in direction of a boundary. There are several other types of named border markers, known as boundary trees, pillars, monuments, obelisks, and corners. Border markers can also be markers through which a border line runs in a straight line to determine that border. They can also be the markers from which a border marker has been fixed.

Kazungula Ferry

The Kazungula Ferry was a pontoon ferry across the 400-metre-wide (1,300 ft) Zambezi River between Botswana and Zambia. It was one of the largest ferries in south-central Africa, having a capacity of 70 tonnes. The service was provided by two motorised pontoons and operated between border posts at Kazungula, Zambia and Kazungula, Botswana.

Maritime boundary Conceptual division of the Earths water surface areas using physiographic or geopolitical criteria

A maritime boundary is a conceptual division of the Earth's water surface areas using physiographic or geopolitical criteria. As such, it usually bounds areas of exclusive national rights over mineral and biological resources, encompassing maritime features, limits and zones. Generally, a maritime boundary is delineated at a particular distance from a jurisdiction's coastline. Although in some countries the term maritime boundary represents borders of a maritime nation that are recognized by the United Nations Convention on the Law of the Sea, maritime borders usually serve to identify the edge of international waters.

The North Carolina–Tennessee–Virginia Corners is a tripoint at which North Carolina, Tennessee and Virginia meet. The landmark is located in the Iron Mountains, and is roughly 16 miles north of Snake Mountain, and 8 miles southwest of Mount Rogers.

Belgium–Netherlands border International border

The Belgium–Netherlands border separates Belgium and the Netherlands and is 450 km (280 mi) long.

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