Rai (satuan): Perbedaan antara revisi

'''''Rai''''' ({{lang-th|ไร่}}, {{IPA-th|râj|pron}}) merupakan satuan luas yang setara dengan 1.600 [[meter persegi]] (16 [[Hectare#are|ares]], 0,16 [[hektare]], 0,3954 [[ekar]]), dan digunakan untuk mengukur area lahan untuk [[kadaster]] atau peta kadaster.<ref>{{cite book|last=Giblin|first=R. W.|year=2008|url=https://archive.org/download/twentiethcentury00wrigrich/twentiethcentury00wrigrich.pdf|title=Twentieth century impressions of Siam|location=London|publisher=Lloyds Greater Britain Publishing Company|editor1-last=Wright|editor1-first=Arnold|chapter=Chapter Royal Survey Work.|quote=<!--All cadastral plans are plotted, drawn, and printed to a scale of 1 to 4,000. It so happens that 40 metres or 4,000 centimeters are equal to one sen, which is the Siamese unit of linear measurement. One centimetre, therefore, on this scale represents one sen, and this is found of great convenience. One square sen is equal to one rai, which is the Siamese unit for the measurement of area. Each cadastral sheet is drawn 50 centimetres and therefore the area represented on each sheet is 2,500 rai, a quantity equal to 1,6187 English [[acre]]s.--> It so happens that 40 metres or 4,000 centimetres are equal to one sen, so all cadastral plans are plotted, drawn, and printed to a scale of 1:4,000.|access-date=January 28, 2012|orig-year=1908|editor2-last=Breakspear|editor2-first=Oliver T|chapter-url=http://www.ebooksread.com/authors-eng/arnold-wright/twentieth-century-impressions-of-siam-its-history-people-commerce-industries-hci/page-23-twentieth-century-impressions-of-siam-its-history-people-commerce-industries-hci.shtml}}</ref>. Ukuran ''rai'' saat ini berasal dari satuan meter, tetapi bukan merupakan bagian dari atau dikenali oleh sistem metrik modern, Sistem Internasional (SI).