Glossary of Terms

-T-

Track Point
The direction of movement relative to a ground position.

Track Segment
A Track Segment holds a list of Track Points which are logically connected in order. To represent a single GPS track where GPS reception was lost, or the GPS receiver was turned off, start a new Track Segment for each continuous span of track data.

 

-W-

WAAS
Wide Area Augmentation System is a FAA funded system of equipment and software that augments GPS. The WAAS provides a satellite signal for WAAS users to support enroute and precision approach aircraft navigation.

Way Point
Fixed location with a specified longitude and latitude and UTM coordinates, which is maintained by a global positioning system (GPS). Waypoints mark a destination, a point along the way to a destination, or a point of reference. GPSs can record a waypoint on the spot to within 3 meters or better using a GPS unit with Wide Area Augmentation System (WAAS) capability. Waypoints can also be marked on a computer mapping program and uploaded to the GPS, marked on the GPS's own internal map, or entered manually on the device as a pair of coordinates.