code	description
km	Kilometer
m	Meter
dm	Decimeter
cm	Centimeter
mm	Millimeter
kmi	International Nautical Mile
in	International Inch
ft	International Foot
yd	International Yard
mi	International Statute Mile
fath	International Fathom
ch	International Chain
link	International Link
us-in	U.S. Surveyor’s Inch
us-ft	U.S. Surveyor’s Foot
us-yd	U.S. Surveyor’s Yard
us-ch	U.S. Surveyor’s Chain
us-mi	U.S. Surveyor’s Statute Mile
ind-yd	Indian Yard
ind-ft	Indian Foot
ind-ch	Indian Chain