Avidyne IFD550 Pilot's Manual page 216

IFD500 Series Pilot Guide
The waypoint is shown displayed as a magenta flag pole. Downpath
waypoints are not depicted in order to reduce map clutter. Fly-over
waypoints typically depict the flight plan flying right through/over the
waypoint whereas fly-by waypoints can turn inside the waypoint.
Airports and obstacles are also depicted on the SVS view.
Map SVS - Curved Flight Path with Next Leg Depiction
4-60 Map Subsystem