bitbanger:
ryan:
thats nice , thanx for explaination but what about calcutaion of Heading/Bearing ?This is how I usually parse for data:
’ NMEA sentence usage:
’ $GPGGA : Time, Latitude, Longitude, number of Satellites in use
’ $GPRMC : Speed over ground, Course over ground, Date
’ $GPGSA : Fix type (none, 2D or 3D)
You need to look at the NMEA spec for $GPRMC for the bearing (“Course of ground”) It is in degrees…no math required.
but this the heading not the bearing …