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Question about recalculating with navigation

Hi all,
I currently own an Edge 810, been using it for almost 5 years now.
Because of broken silicon on/off button I'm thinking of moving to a newer model Garmin. Maybe the new Edge Explore or the more expensive Edge 1030.

An issue with the Edge 810 is troublesome recalculating after a route deviation.
As I understand the Edge 1030 has different navigation software, maybe it's better now with the 1030. Hope someone can verify this.

So, how does the 1030 recalculate a deviation when using it to calculate a route from starting point A to endpoint B?
No preloaded course! The 1030 does a fresh on the device calculated route.
How does the 1030 recalculate when deviating from this route?
Option A. Does it recalculate an alternative route directly to endpoint B? Same like car navigation.
Option B. Does it try to bring you back to original calculated route or bring you back to the point where you deviated from the original route?

Option B is what my 810 does and that really is bad.
So, I hope the 1030 now works like option A.
Someone experience with this?

0 randybb over 6 years ago

It navigates you back to the point where your left the desired route, but from some point it will recalculates to closest possible intersection where you can continue with your route. It is fine when you are on a race, but normally I just use map to bring me back when I take a shortcut ;)

0 ArnoldvO over 6 years ago

Thanks.
That means the 1030 works the same as my 810. So, from that perspective no need to upgrade :confused:.
As I understand the Mio/Magellan devices have the same behaviour.
Strange, why can't these bike devices not act the same as car navigation and thus make a difference in following a course or following a route.:o

0 randybb over 6 years ago

When you are following a route, then it is an expected behavior. Only in case you just start navigation from your Edge to a desired location it will act as a standard car navigation

0 dpawlyk over 6 years ago

Option A. Does it recalculate an alternative route directly to endpoint B? Same like car navigation.
Option B. Does it try to bring you back to original calculated route or bring you back to the point where you deviated from the original route?

Option B is what my 810 does and that really is bad.

You can get option A by dropping a location at the endpoint and having the unit calculate a route to it.

This is easy enough to do that the unit doesn't really need to do it for you.

I suspect that most people actually prefer having option B being the default (why use a route if you aren't going to use it?).

Navigating to the end of the route should be something added to the units.

0 dpawlyk over 6 years ago

Strange, why can't these bike devices not act the same as car navigation and thus make a difference in following a course or following a route.:o

They do. You can have the device calculate a route to an arbitrary location just like any car navigation unit.

Not many car navigation units provide the option to follow a route.

0 ArnoldvO over 6 years ago

Hi, I know the Edge devices can calculate a route from startpoint A to endpoint B. And that it also has the function to navigate a predefined course. So, it's nice that the Edge has 2 kind of navigation functionality,
My problem is with the way the Edge handles route deviations. It then acts like the route is a course and thus gives directions to bring you back to the calculated route the same way it brings you back to a predifined course.
What I would like the Edge to do is if there is a route deviation to recalculate a 'new' route to endpoint B. That's missing.

So, what I do when this happens, is to stop the navigation and to renew start a route from (the new) A to endpoint B.
This works, but is not easy to do when you are biking.

0 NeilJonesOnline over 6 years ago

It doesn't make sense to expect similar behaviour between car GPS and bike GPS units, as each serves a different purpose. In general, car journeys are all about the destination (or maybe waypoints); on a bike it's generally about the journey itself. In other words, vehicle GPS logic should be based on getting from A to B as quickly as possible, whereas on a bike it's usually about getting from A back to A in a set time or over a set distance.

So if I'm out on a planned 100km/4 hour round trip ride on my bike, the last thing I want to happen if I have to take a short detour after an hour is for my Edge to reroute to get me back to my destination via the most direct route so I find myself there 30 minutes later. Instead I want it to get me back onto my planned course as soon as it can, but ideally without too much backtracking.

0 dpawlyk over 6 years ago

My problem is with the way the Edge handles route deviations. It then acts like the route is a course and thus gives directions to bring you back to the calculated route the same way it brings you back to a predifined course.
What I would like the Edge to do is if there is a route deviation to recalculate a 'new' route to endpoint B. That's missing.

I misunderstood what your issue was.

You are talking about what the unit does when not using a loaded course.

What you want is to have the unit discard the calculated route every time we you deviate from it.

The 800 works that way.

Maybe, Garmin changed the behavior because the units can take a long time to calculate a route. Taking minutes to recalculate every deviation would make that feature useable.

It's also not clear what behavior most people would prefer.

In any case, you are stuck with whatever behavior the 1030 provides.

0 ArnoldvO over 6 years ago

Let me try to explain what I'm looking for.

In the picture you see a part of a route I biked. This route was an A-to-B navigation, calculated on the 810. Arrows give bike direction.
Orange was the calculated route, blue was the route I biked.

At intersection (1) I decided to take a right turn, so a deviation of the calculated route.
From that moment on the 810 gives re-calculated turns to go back. It repeated this several times and the distance to endpoint kept increasing.
Question: what direction will the 1030 give at this point?

At intersection (2) the 810 gives a LEFT turn and again, the distance to endpoint is increasing.
Question: what direction will the 1030 give at this point?

At (2) I took (ofcourse) a RIGHT turn and after a while the 810 picked up the original calculated route. Distance to endpoint then drops.

This behaviour of the 810 makes it less suitable for taking a bike route in an unknown region, because deviating a route means 'faulty' directions.

So, if the 1030 does a better job here, then I'm considering an upgrade.ciq.forums.garmin.com/.../1387098.jpg