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I came across a tutorial today on Code Project called “Mapping with a GPS and C#“. I then found this cheap usb GPS receiver on Amazon for $29. And so begins a new little project I would like to try out.

The NMEA 0183 Stream

What isn’t mentioned in the tutorial in any great depth is that NMEA stream coming from the reciever actually holds a lot more information than just the simple logitude and latitude of the reciever. Here is a list of some of the highlights:

• $GPAAM – Waypoint Arrival Alarm
• $GPBOD – Bearing, Origin to Destination
• $GPBWW – Bearing, Waypoint to Waypoint
• $GPGGA – Global Positioning System Fix Data
• $GPGLL – Geographic Position, Latitude/Longitude
• $GPGSA – GPS DOP and Active Satellites
• $GPGST – GPS Pseudorange Noise Statistics
• $GPGSV – GPS Satellites in View
• $GPHDG – Heading, Deviation & Variation
• $GPHDT – Heading, True
• $GPRMB – Recommended Minimum Navigation Information
• $GPRMC – Recommended Minimum Specific GPS/TRANSIT Data
• $GPRTE – Routes
• $GPVTG – Track Made Good and Ground Speed
• $GPWCV – Waypoint Closure Velocity
• $GPWNC – Distance, Waypoint to Waypoint
• $GPWPL – Waypoint Location
• $GPXTE – Cross-Track Error, Measured
• $GPXTR – Cross-Track Error, Dead Reckoning
• $GPZDA – UTC Date/Time and Local Time Zone Offset
• $GPZFO – UTC and Time from Origin Waypoint
• $GPZTG – UTC and Time to Destination Waypoint

[via link and the complete list here]

So I was thinking about putting together a little bigger application together and utilizing more of the NMEA stream that would sync up with a website.