//
//      imperial_units.hpp
//
//	Copyright (c) 2001 by Michael S. Kenniston.  The most recent
//	version will be available at www.boost.org.  Permission is granted
//	to use this code without restriction so long as this copyright
//	notice appears in all source files.

//	This code is provided as-is, with no warrantee of correctness.

//	Unless otherwise specified, the definitions of all units in this
//	file are from NIST Special Publication 811, found online at
//	http://physics.nist.gov/Document/sp811.pdf


#ifndef _BFAFCE61_5FA7_11d5_B9D8_000000000000
#define _BFAFCE61_5FA7_11d5_B9D8_000000000000

#include "quantity_types.hpp"

namespace quantities {

inline quantity< length_d >			nautical_mile()	{ return 1852 * meter(); }
inline quantity< speed_d >			knot()			{ return 1852 / 3600 * meter() / second(); }
inline quantity< frequency_d >		curie()			{ return 3.7e10 * becquerel(); }
inline quantity< exposure_d >			roentgen()		{ return 2.58e-4 * coulomb() / kilogram(); }
inline quantity< dose_d >				rad()			{ return 1e-2 * gray(); }
inline quantity< dose_d >				rem()			{ return 1e-2 * sievert(); }

inline quantity< area_d >				acre()			{ return 4.046873e+3 * meter() * meter(); }
inline quantity< volume_d >			acre_foot()		{ return 1.233489e+3 * meter() * meter() * meter(); }

inline quantity< length_d >			inch()			{ return 2.54 * centi() * meter(); }
inline quantity< length_d >			foot()			{ return 12 * inch(); }
inline quantity< length_d >			mile()			{ return 5280 * foot(); }

} // namespace quantities

#endif // _BFAFCE61_5FA7_11d5_B9D8_000000000000