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Rod (US Survey)

La US survey rod (symbol: rd) est une unité de length égal à 16½ US survey feet, approximativement 5.029210 metres, utilisé en the États-Unis public land survey system. It differs very slightly from the international rod of 5.0292 metres due to the definition of the US survey foot. One hundred US survey links equal one US survey chain, qui in turn est égal à four US survey rods. 


mètre

La metre (Commonwealth spelling and BIPM spelling) or meter (American spelling) (from the French unit mètre, from the Greek noun μετρούν, "measure") is the unité de base de longueur dans le Système international d'unités (SI) (SI). The unité SI symbol is m. Le mètre est défini comme the length of the path travelled by light in a vacuum in 1/299,792,458 of a second.

Le mètre was à l'origine defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, so the Earth's circumference is approximativement 40000 km. In 1799, the metre was redefined in terms of a prototype metre bar (the actual bar used was changed in 1889). In 1960, the metre was redefined in terms of a certain number of wavelengths of a certain emission line of krypton-86. In 1983, the current definition a été adopté. 


Table de conversion Rod (US Survey) en mètre
Rod (US Survey)mètre
15.02921
210.0584
525.1461
1050.2921
25125.73
50251.461
100502.921
5002514.61
10005029.21

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