https://ideawaza.com/api.php?action=feedcontributions&feedformat=atom&user=193.26.4.35 2026-09-29T21:32:04Z User contributions MediaWiki 1.46.0 https://ideawaza.com/index.php?title=Geographical_mile&diff=35903 2008-11-26T12:57:18Z

<p>193.26.4.35: </p> <hr /> <div>{{unreferenced|date=November 2006}}<br /> <br /> {{unit of length|<br /> |m= 1855.325<br /> |accuracy=4<br /> }}<br /> The '''geographical mile''' is a unit of length determined by 1 [[minute|minute of arc]] along the [[Earth]]'s [[equator]], approximately equal to 1855.325 [[metre]]s (6087.025 international [[foot (unit of length)|feet]]). Any greater precision depends more on choice of standard than on more careful measurement: the length of the [[equator]] in the [[World Geodetic System]] WGS-84 is 40,075,016.6856 m which makes the geographical mile 1855.3248 m, while the [[International Astronomical Union]] standard IAU-2000 takes the [[equator]] to be 40,075,035.5351 m making the geographical mile 1855.3257 m, almost a millimetre longer.<br /> <br /> The unit is not used much; it is closely related to the [[nautical mile]], which was originally determined as 1 minute of arc along a [[great circle]] of the Earth but is nowadays defined as exactly 1852 metres.<br /> <br /> The [[Denmark|Danish]] and [[Germany|German]] '''geographical mile''' (''mil'' and ''Meile'' respectively) is 4 minutes of arc, and was defined as approximately 7421.5 metres by the astronomer [[Ole Rømer]] of [[Denmark]]. In [[Norway]] and [[Sweden]], this 4 minute geographical mile was mainly used at sea (''sjømil''), up to the beginning of the 20th century.<br /> <br /> ==See also==<br /> <br /> *[[conversion of units]] <br /> *[[Medieval weights and measures]] for details of the geographical [[league]] of [[France]]<br /> *[[mile]] for the various other miles in use<br /> *[[nautical mile]]<br /> <br /> [[Category:Units of length]]<br /> <br /> [[da:Geografisk mil]]<br /> [[sl:geografska milja]]</div>

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