units.h

00001 /*
00002  *
00003  * NMEA library
00004  * URL: http://nmea.sourceforge.net
00005  * Author: Tim (xtimor@gmail.com)
00006  * Licence: http://www.gnu.org/licenses/lgpl.html
00007  * $Id: units.h 4 2007-08-27 13:11:03Z xtimor $
00008  *
00009  */
00010 
00011 #ifndef __NMEA_UNITS_H__
00012 #define __NMEA_UNITS_H__
00013 
00014 #include "config.h"
00015 
00016 /*
00017  * Distance units
00018  */
00019 
00020 #define NMEA_TUD_YARDS      (1.0936)        /**< Yeards, meter * NMEA_TUD_YARDS = yard */
00021 #define NMEA_TUD_KNOTS      (1.852)         /**< Knots, kilometer / NMEA_TUD_KNOTS = knot */
00022 #define NMEA_TUD_MILES      (1.609)         /**< Miles, kilometer / NMEA_TUD_MILES = mile */
00023 
00024 /*
00025  * Speed units
00026  */
00027 
00028 #define NMEA_TUS_MS         (3.6)           /**< Meters per seconds, (k/h) / NMEA_TUS_MS= (m/s) */
00029 
00030 #endif /* __NMEA_UNITS_H__ */