93a60a57-a3c8-18da-a746-0800200c9a66 Units of area Technical unit groups Reference Unit Group Data Set of the International Reference Life Cycle Data System (ILCD). 0 2012-01-04T23:33:14.875+09:00 ILCD format 03.00.003 http://openlca.org/ilcd/resource/unitgroups/93a60a57-a3c8-18da-a746-0800200c9a66 nmi2 3429904.0 Square nautical mile ha 10000.0 Hectare yd2 0.83612736 Square yard (imperial/US) m2 1.0 Square metre ac 4046.856 Acre (US survey) mi2 2589988.11 Square mile (international) ft2 0.09290304 British square foot km2 1000000.0 Square kilometre cm2 1.0E-4 Square centimetre a 100.0 Are