Hectare

Description

table-comparison-of-area-units

The hectare ( |archive-url = https://web.archive.org/web/20110101110815/http://oxforddictionaries.com/view/entry/m_en_gb0370830#m_en_gb0370830 |url-status = dead |archive-date = 1 January 2011 |access-date = 24 December 2010 However, the United States and Myanmar (Burma) |archive-url=https://web.archive.org/web/20070613023743/https://www.cia.gov/library/publications/the-world-factbook/appendix/appendix-g.html |url-status=dead |archive-date=13 June 2007 |access-date=8 August 2006

In many countries, metrification redefined or clarified existing measures in terms of metric units. The following legacy units of area have been redefined as being equal to one hectare:

• Jerib () in Iran
• Djerib () in Turkey
• Gongqing () in China
• Manzana in Argentina
• Bunder in the Netherlands (until 1937) |trans-title = Area |access-date = 15 January 2011 |archive-date = 19 June 2021 |archive-url = https://web.archive.org/web/20210619223013/https://home.kpn.nl/vanadovv/Opp.html |url-status = dead |trans-title=Introduction to Numeracy |access-date =19 September 2012 In Mexico, land area measurements are commonly given as combinations of hectares, ares, and centiares. These are commonly written separated by a hyphen; for example, 1-21-00.26 ha would mean 1 hectare, 21 are, and 0.26 centiare ().

History

The metric system of measurement was first given a legal basis in 1795 by the French Revolutionary government. The law of 18 Germinal, Year III (7 April 1795) defined five units of measure: |trans-title=The law of 18 Germanial year 3 "The [Republican] measure of land area equivalent to a ten-metre square" |access-date = 2 March 2010

• The :metre for length
• The are (100 m2) for area [of land]
• The stère (1 m3) for volume of stacked firewood |access-date = 21 March 2011 |archive-url = https://web.archive.org/web/20110721011132/http://www.utc.fr/~tthomass/Themes/Unites/unites/infos/stere/Le%20stere.pdf |archive-date = 21 July 2011 |url-status = dead
• The :litre (1 dm3) for volumes of liquid
• The gram for mass

In 1960, when the metric system was updated as the International System of Units (SI), the are did not receive international recognition. The International Committee for Weights and Measures () makes no mention of the are in the 2019 edition of the SI brochure, but classifies the hectare as a "Non-SI unit accepted for use with the International System of Units". |access-date=28 August 2023

In 1972, the European Economic Community (EEC) passed directive 71/354/EEC, | access-date = 7 February 2009 | archive-date = 25 April 2009 | archive-url = https://web.archive.org/web/20090425221644/http://eur-lex.europa.eu/Notice.do?mode=dbl&lang=en&lng1=en,nl&lng2=da,de,el,en,es,fr,it,nl,pt,&val=22924:cs&page=1&hwords= | url-status = dead

Unit family

The names centiare, deciare, decare and hectare are derived by adding the standard metric prefixes to the original base unit of area, the are.

Decimilliare

The decimilliare (dma, sometimes seen in cadastre area evaluation of real estate plots) is are or one square decimetre. Such usage of a double prefix is non-standard. The decimilliare is (100 mm)2 or roughly a four-inch-by-four-inch square. (The decimilliare is smaller by approximately 3.1%.)

Centiare

The centiare is one square metre.

Deciare

The deciare (rarely used) is ten square metres.

Are

The are ( |archive-url = https://archive.today/20130130231454/http://oxforddictionaries.com/view/entry/m_en_gb0038720?rskey=sLRO50&result=2%23m_en_gb0038720 |url-status = dead |archive-date = 30 January 2013 |access-date = 24 December 2010

In Russian and some other languages of the former Soviet Union, the are is called sotka (сотка: 'a hundred', i.e. 100 m2 or hectare). It is used to describe the size of suburban dacha or allotment garden plots or small city parks where the hectare would be too large. Many Russian dachas are 6 ares in size (in Russian, шесть соток).

Decare

The decare or dekare () is derived from deca and are, and is equal to 10 ares or 1000 square metres. It is used in Norway |access-date = 16 November 2010 |access-date=16 November 2010 |url-status=dead |archive-url=https://web.archive.org/web/20101022061357/http://www.bnr.bg/sites/en/Economy/Pages/0510Marketofagriculturalland.aspx |archive-date=22 October 2010

• Stremma in Greece
• Dunam, dunum, dulum, donum, or dönüm in the Balkans, Israel, Palestine, Jordan, Lebanon, Syria, and Turkey
• Mål in Norway.

Conversions

The most commonly used units are in bold.

One hectare is also equivalent to:

• 1 square hectometre
• 1.008 chō (Japan)
• 2.381 feddan (Egypt)
• 6.25 rai (Thailand)
• 10 dunam or dönüm (Middle East){{cite book |url-access = registration |access-date = 29 March 2011}}
• 10 stremmata (Greece)
• 15 mǔ or 0.15 qǐng{{cite web |access-date = 24 December 2010}}

Unicode

The Unicode character , in the CJK Compatibility block, is intended for compatibility with pre-existing East Asian character codes. It is not intended for use in alphabetic contexts. is a combination of ヘクタール (ja), the Japanese translation of "hectare".

References

References

1. Bureau international des poids et mesures. (2006). "The International System of Units (SI)".
2. ''[[Oxford English Dictionary]]'', 1st edition [http://www.oed.com/view/Entry/10502 ''s.v.'']
3. (2014). "SI Brochure, Table 6".
4. The Council of the European Communities. (27 May 2009). "Council Directive 80/181/EEC of 20 December 1979 on the approximation of the laws of the Member States relating to Unit of measurement and on the repeal of Directive 71/354/EEC".
5. "Working Paper No. 6 – Agroindustry in Myanmar". MYA/01/008 Agriculture Sectore Review.
6. [https://www.britannica.com/EBchecked/topic/259196/hectare Britannica.com, unit of measurement], accessed 30 October 2009
7. {{Cite EB1911. 10000 square metres), to be paid whether the mine is worked or not.
8. "Superficie de terrenos". [[Secretariat of Public Education (Mexico).
9. (1858). "Robinson's Progressive Practical Arithmetic: Containing the Theory of Numbers in Connection with Concise Analytic and Synthetic Methods of Solution, and Designed as a Complete Text-book on this Science for Common Schools and Academies". Ivison, Blakeman, Taylor.
10. "centiare". [[Dictionary.com, LLC]].
11. "centiare". [[Collins Publishers]].
12. "deciare". [[Merriam-Webster, Incorporated]].
13. "are – definition. American English definition of are by Macmillan Dictionary". Macmillandictionary.com.
14. (March 2006). "SI brochure (8th edition)". BIPM.
15. Λεξικό της κοινής Νεοελληνικής (Dictionary of Modern Greek), Ινστιτούτο Νεοελληνικών Σπουδών, Θεσσαλονίκη, 1998. {{ISBN. 960-231-085-5
16. (2006). "Mandated landscape: British imperial rule in Palestine, 1929–1948". [[Routledge]].
17. (1974). "BS350:Part 1:1974 Conversion factors and tables Part 1. Basis of tables. Conversion factors". British Standards Institution.
18. Unicode.org. "CJK Compatibility block".