Originally Posted by
unterhausen
The thing about the RWGPS and cues 30 meters ahead of time I think only applies to devices like the 800.
It works with the 500 as a paid subscriber, but is spotty. You might get the alert before the intersection, or it might be as you're going through it.
With "turn guidance" enabled 800 turn alerts are a lot nicer - the map screen pops up with the turn highlighted in white 0.1 miles before hand, even if RWGPS didn't generate a CoursePoint; and if RWGPS was being silly it's obvious you're not turning.
The 800 (and beyond, although my 810 crashed on my first ride and I lost data within the first week) also makes distance to turn, distance to course point, and next turn fields which can be on any screen; not just the course and cue sheet screens.
The cue sheet is built into the TCX file, I don't think it's there in a gpx file.
Right. There are <CoursePoint> XML elements with <Name> and <PointType> children identifying the road and turn direction which are displayed.
RWGPS implements the advance warning by moving the <CoursePoint> <Position> <LattitudeDegrees> and <LongitudeDegrees> fields closer to the route start.