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TBT turn notification missing

Scorp1981
over 4 years ago

Since my runs are getting longer, I've been using the maps/navigation on my Forerunner 945 a lot in the past couple of months. I've been plotting many different courses to make sure to get the proper distances. Also I'm experimenting with different routes (usualy trying to get the flattest route possible Sweat smile).

The thing is, when using a saved route, about 25% (might be more) of the time I just won't get a turn notification. When going to the map, It will show a turn much farther away (say, like in 800 meters), even though there are one or two other turns in between. I thought this might be a map problem so I downloaded another map of my region. No luck, still missing a lot of turn notifications. unfortunately this means that on many intersection I've to check the maps if I have to turn or not. This actualy defeats the whole purpose of TBT navigation.

I think it's always the same intersections that do not prompt a turn notification, but I'm not a 100% sure whether this is true or just a coincidence.

All my maps as well as the firmware are up to date. Anyone else experiencing the same problems?

  • 0 over 4 years ago

    Thats because the street is not making a turn, but a curve on the map. Do you get what I mean?

    What other map did you download? Is it routable? Did you delete the Garmin one? 

  • 0 over 4 years ago in reply to BeneGi

    Actualy, they are definitely turns, and not curves. Like, choosing between going straight, 90° right or 90° left.

    I downloaded "freizeitkarten" OSM map. They are routable (else I'd not have had any turn notifications). Never had a problem with those on other devices. BTW, I don't have the same problems on my Edge 830 with the same Garmin maps.

    I did delete the Garmin maps once to make a fresh install, but not when loading the other OSM map. But I did disable the Garmin maps when running with the other map.

  • 0 over 4 years ago

    Here some pics to better visualize what I mean

  • 0 over 4 years ago in reply to Scorp1981

    Wenn die Uhr ein abbiegen erkennt, wird auf der magentafarbenen Route ein weißer Pfeil eingeblendet.
    Wie wechseln da die Straßennamen an solchen Stellen? Kann es sein, dass du auf Radwegen läufst und die verschwenken, weg vom orangen Weg?

    Die vorinstallierte Garmin und die Freizeitkarte basieren beide auf OSM, da wird sich nicht viel ändern wenn du die Karten änderst. 

  • 0 over 4 years ago in reply to BeneGi

    Yep, dass mit den OSM Karten ist mir durchaus bewusst, trotzdem sind die Routendaten teils unterschiedlich, daher habe ich es mit den Freizeitkarten ausprobiert.

    Das mit den Pfeilen wird in der Regel so dargestellt, wie du es beschrieben hast -insofern die Abbiegehinweise auch tatsächlich funktionieren... Wenn nicht, dann schaut es eben so aus wie auf den Bildern.

    Leider passiert es auf allen Arten von Wegen, unabhängig von Radwegen. Also auch auf Feldwege, Waldwege, normale Strassen, etc. Auch wird die Strasse deutlich gewechselt, d.h. die Strassennamen sind dann auch unterschiedlich. Trotzdem fehlen teils bis zu drei Abbiegehinweise hintereinander...

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    Sorry guys, it's late, so I don't feel like translating everything. Basically I see no common denominator regarding roads that makes the error reproducible.

  • 0 over 4 years ago

    Btw, I forgot to mention that I tried creating the Routes with different sources. Garmin, Komoot, Plotaroute, ecc. Doesn’t make any difference. I wonder whether it’s my watch, the maps or Garmin’s way to calculate a route...

  • 0 over 4 years ago

    Garmin Connect seems to be generating TBT directions based on sharp changes in the course direction rather than actual trail turns. I've seen many cases when the watch missed  a turn direction for an actual a turn yet when I go on a trail with switchbacks I get turn notifications every 30-100 meters even though there are no actual turns (i. e. no side trails). Basically, on trails TBT directions are more annoying than helpful. 

    Just to be clear, these TBT directions are generated by Garmin Connect and don't depend on the actual map on the watch, whether it is routable, etc.

    When a course is uploaded directly via USB, bypassing Garmin Connect, TBT directions aren't added.