Interface for representing a waypoint in a collection of waypoints.

Acceleration	Rate of increase (if positive) or decrease (if negative) in the velocity of the vehicle. Uses Acceleration Dimension.
Altitude	Altitude of the waypoint. Changes in altitude take effect linearly between two waypoints. Uses Distance Dimension.
Latitude	Latitude of the waypoint. Uses Angle Dimension.
Longitude	Longitude of the waypoint. Uses Angle Dimension.
Speed	Velocity of the vehicle from the current waypoint to the next. A change in velocity occurs immediately at the waypoint. Uses Rate Dimension.
Time	Time at which the vehicle is at the waypoint. Uses DateFormat Dimension.
TurnRadius	Curvature of the arc between the current waypoint and the next waypoint. A smaller turn radius produces a sharper curve in the arc. Uses Distance Dimension.