Proposal for GPX
Nautical and Aeronautical
Nautical and aeronautical elements have been suggested.
| Name |
Description |
| aspeed |
Air speed is the speed of an aircraft relative to the air in meters per second (m/s) |
| drift |
Speed of the water / current in meters per second (m/s) |
| heading |
Direction in which the nose or bow is pointed, relative to true north in degrees (°) |
| pitch |
Fore / aft rotation of an aircraft or vessel (trim) about its transverse axis in degrees (°) |
| roll |
Tilting of an aircraft or vessel (heel) about its longitudinal axis in degrees (°) |
| set |
Direction of the water / current, relative to true north in degrees (°) |
| wdist |
Total distance through the water in meters (m) |
| wspeed |
Water speed / boat speed is the speed of a vessel through the water in meters per second (m/s) |
Omissions:
- There is no need for velocity made good (VMG) since it is derived from speed over ground (SOG) and true wind direction (TWD)
- This list ignores NMEA trawler data such as TDS, TFI, TPC, TPR, and TPT
- This list ignores engine data in NMEA 2000 and the RPM sentence in NMEA 0183
References
- GPX developers list
- GPX proposal
- Garmin
- TrackPointExtension v2 - schema - search for “bearing”
- Sailing Terminology and Definitions - article
- Set and drift - explanation
- NMEA 0183
- VDR - set and drift
- VHW - water speed and heading
- VLW - distance traveled through water
- $PASHR - RT300 proprietary roll and pitch sentence
- NMEA 2000
- Wikipedia
- Sailmon
- Max - live data - display shows heel and pitch, although CSV export calls them heel and trim
- Vakaros
- Atlas 2 - tech specs - core measurements are position, velocity, heading, heel, pitch, and barometric pressure