Shaping points and Via points

[Bouke Ent]

i also looked at beeline. beeline is better is follow the plan you made. MRA is better to plan. MRA Next has many good point but also to many functions and some main function like how to deal with track and gpx file or skipping shaping point or follow the route when back on the route you planned are in my opinion not perfect. I hope in planning of future development.

[Martin Wilcke]

@Con-Hennekens said in Shaping points and Via points:

since the one-and-only function of a VIA point is that it cannot be skipped automatically

Hence, my suggestion for a change.

When navigating a track, there are two common concepts to lead you back in case of a deviation:

• to the point where you left the track

• to the most logical point in the forward direction

There might be additional "points" (waypoints, POIs, whatever) along the track; however, they are informational only (may be announced) and do not influence the navigation.

This concept is becoming increasingly popular, and it would be a good idea to implement it in MRA as well.

[BertM]

@Martin-Wilcke said in Shaping points and Via points:

• to the most logical point in the forward direction

This seems like an interesting point to me:
When following a track, you follow a line.

How does the program know what the next point is, i.e., the direction you want to go?
I believe a program can only calculate the nearest point, and unfortunately, that can also be in the wrong direction.

[Martin Wilcke]

@BertM said in Shaping points and Via points:

How does the program know what the next point is, i.e., the direction you want to go?

Trackpoints <trkpt> do have a specific order, and therefore a track <trk> has a direction. "Forward direction" means "Track forward direction".

[BertM]

@Martin-Wilcke said in Shaping points and Via points:

@BertM said in Shaping points and Via points:

How does the program know what the next point is, i.e., the direction you want to go?

Trackpoints <trkpt> do have a specific order, and therefore a track <trk> has a direction. "Forward direction" means "Track forward direction".

But you are not ON the track... your outside the track.
Lets assume you left the track on point 3, and now you near point 6, how does the app knows your best point to enter is 7 instead of 6?

[Martin Wilcke]

@BertM

From what I've experienced, the route back to the track is calculated as if you were planning a route—and in fact, some programs do exactly this: the track remains unchanged, and an additional route is generated.

Of course, I don't know the exact program logic, but I imagine it works like this:

• First, various entry points are determined (i.e., points where a routable path intersects the track), possibly as an initial approximation based on the straight-line distance.

• Then the resulting routes are calculated based on an explicit or implicitly assumed routing profile (fast, short, winding, etc.).

• The result that best matches the profile specifications is then used to generate the route back to the track

[Martin Wilcke]

@BertM
Here's a screenshot (actually a simulation with Stegra.io ) :

• the blue line is the original track

• the red/purple is the calculated (re-) route

• the green is the recorded track