Arpent
Encyclopedia
An arpent is a unit of length
Length
In geometric measurements, length most commonly refers to the longest dimension of an object.In certain contexts, the term "length" is reserved for a certain dimension of an object along which the length is measured. For example it is possible to cut a length of a wire which is shorter than wire...

 and a unit of area
Area
Area is a quantity that expresses the extent of a two-dimensional surface or shape in the plane. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat...

. It is a pre-metric French unit
French units of measurement
France has a unique history of units of measurement due to radical attempts to adopt a metric system following the French Revolution.In the Ancien régime, before 1795, France used a system of measures that had many of the characteristics of the modern Imperial System of units...

 based on the Roman actus. It is used in Quebec
Quebec
Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....

 as well as in some areas of the United States that were part of French Louisiana
Louisiana (New France)
Louisiana or French Louisiana was an administrative district of New France. Under French control from 1682–1763 and 1800–03, the area was named in honor of Louis XIV, by French explorer René-Robert Cavelier, Sieur de la Salle...

.

Unit of length

There were various standard arpents. The most common ones were of 180 French feet, used in French North America, and 220 French feet, used in Paris.

1 arpent = 180 French feet (of approximately 32 centimetres) = about 192 English feet = about 58.47 metres

Unit of area

  • Historically, in North America, 1 (square) arpent = 32,400 French square feet = about 3419 square metres
  • In Louisiana
    Louisiana
    Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

    , Mississippi
    Mississippi
    Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi...

    , Alabama
    Alabama
    Alabama is a state located in the southeastern region of the United States. It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama ranks 30th in total land area and ranks second in the size of its inland...

    , and Florida
    Florida
    Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

    , the official conversion is 1 arpent = 0.84628 acres (3,424.77668 m²)
  • In Arkansas
    Arkansas
    Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River...

     and Missouri
    Missouri
    Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...

    , the official conversion is 1 arpent = 0.8507 acres (3,442.6638 m²) square metres

Arpents in U.S. land descriptions (Louisiana)

In Louisiana, parcels of land known as arpent sections or French arpent land grants also pre-date the Public Land Survey System
Public Land Survey System
The Public Land Survey System is a method used in the United States to survey and identify land parcels, particularly for titles and deeds of rural, wild or undeveloped land. Its basic units of area are the township and section. It is sometimes referred to as the rectangular survey system,...

 (PLSS), but are treated as PLSS sections. An arpent is a French measurement of approximately 192 feet (58.5 m), and a square arpent (also referred to as an arpent) is about 0.84 acres (3,399.4 m²).

French arpent land divisions are long narrow parcels of land usually found along the navigable streams of southern Louisiana, and also found along major waterways in other areas. This system of land subdivision was begun by French settlers in the 18th century, according to typical French practice at the time and was continued by both the Spanish and by the American government after the acquisition of the Louisiana Purchase. A typical French arpent land division is 2 to 4 arpents wide along the river by 40 to 60 arpents deep, while the Spanish arpent land divisions tend to be 6 to 8 arpents wide by 40 arpents deep.

This method of land division provided each land-owner with river frontage as well as land suitable for cultivation and habitation. These areas are given numbers just like standard sections, although the section numbers frequently exceed the normal upper limit of 36.

See also

  • Acre
    Acre
    The acre is a unit of area in a number of different systems, including the imperial and U.S. customary systems. The most commonly used acres today are the international acre and, in the United States, the survey acre. The most common use of the acre is to measure tracts of land.The acre is related...

  • Morgen
    Morgen
    A morgen was a unit of measurement of land in Germany, the Netherlands, Poland and the Dutch colonies, including South Africa and Taiwan. The size of a morgen varies from 1/2 to 2½ acres, which equals approximately 0.2 to 1 ha...

  • Units of measurement in France before the French Revolution
    Units of measurement in France before the French Revolution
    200px|thumb|right|Woodcut dated 1800 illustrating the new decimal units which became the legal norm across all France on 4 November 1800Before the Revolution French units of measurement were based on the Carolingian system, introduced by the first Holy Roman Emperor Charlemagne which in turn were...

  • Voltaire
    Voltaire
    François-Marie Arouet , better known by the pen name Voltaire , was a French Enlightenment writer, historian and philosopher famous for his wit and for his advocacy of civil liberties, including freedom of religion, free trade and separation of church and state...

     famously dismissed Canada as Quelques arpents de neige, "some acres of snow".
  • Weights and Measures Act (R.S. 1985)
    Weights and Measures Act (R.S. 1985)
    Weights and Measures Act is a Canadian law governing the units of measurements used in Canada.Originally passed in 1970 as part of the federal government's plan for metrication of Canada from Imperial measures, it was stopped in 1985 and changes were made to the Act...

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