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Tunnels and navigation

Scheduled Pinned Locked Moved [Beta] Problems, Bugs and other Issues
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  • Jörgenundefined Offline
    Jörgenundefined Offline
    Jörgen
    Instructor
    wrote on last edited by
    #1

    Hi, what I forgot in my list after the trip to Norway.

    The Here map did not show tunnels and there are a lot in Norway.
    I have not noticed how it is in other countries, may be you can report.

    The other problem was, if the tunnel is very long (and there some in Norway) then first the position arrow follows the street, but after some time (10min) it stops moving and the map starts to turn around to left, to right until you are out of the tunnel again.
    If for example there is an exit or a roundabout, you have no idea where to drive.

    IMG_4318-s.JPG

    Hardware
    iPhone 12 pro (iOS 17.0.2)
    Oukitel RT3 (Andr. 12)
    Samsung Galaxy XCover 4 (Andr. 9 Pie)
    Wireless CarPlay mit (Elebest C650)
    Wired CarPlay (SEAT Arona - 2021)
    For more information, click here

    Nick Carthewundefined Corjan Meijerinkundefined Hubert Thoringundefined 3 Replies Last reply
    0
    • Jörgenundefined Jörgen

      Hi, what I forgot in my list after the trip to Norway.

      The Here map did not show tunnels and there are a lot in Norway.
      I have not noticed how it is in other countries, may be you can report.

      The other problem was, if the tunnel is very long (and there some in Norway) then first the position arrow follows the street, but after some time (10min) it stops moving and the map starts to turn around to left, to right until you are out of the tunnel again.
      If for example there is an exit or a roundabout, you have no idea where to drive.

      IMG_4318-s.JPG

      Nick Carthewundefined Offline
      Nick Carthewundefined Offline
      Nick Carthew
      RouteXperts Instructor
      wrote on last edited by
      #2

      @Jörgen I think that you are using an extreme example of a tunnel. I can’t think of many tunnels with a roundabout in the middle apart from Norway. I presume that there was signposts in the tunnel?

      Always willing to help if I can.
      Triumph Tiger 1200 XRT called Tina.
      MRA Navigation Next and SilverFox B8J bar buttons.
      Quadlock wireless mount for IPhone 11.
      Cardo Scala Packtalk Bold.
      TomTom Rider 500. (In the cupboard now)

      Jörgenundefined 1 Reply Last reply
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      • Nick Carthewundefined Nick Carthew

        @Jörgen I think that you are using an extreme example of a tunnel. I can’t think of many tunnels with a roundabout in the middle apart from Norway. I presume that there was signposts in the tunnel?

        Jörgenundefined Offline
        Jörgenundefined Offline
        Jörgen
        Instructor
        wrote on last edited by
        #3

        @Nick-Carthew said in Tunnels and navigation:

        I presume that there was signposts in the tunnel?

        I forgot how to use them 😉

        Yes they helped me to get out.

        Hardware
        iPhone 12 pro (iOS 17.0.2)
        Oukitel RT3 (Andr. 12)
        Samsung Galaxy XCover 4 (Andr. 9 Pie)
        Wireless CarPlay mit (Elebest C650)
        Wired CarPlay (SEAT Arona - 2021)
        For more information, click here

        Jörgenundefined 1 Reply Last reply
        1
        • Jörgenundefined Jörgen

          @Nick-Carthew said in Tunnels and navigation:

          I presume that there was signposts in the tunnel?

          I forgot how to use them 😉

          Yes they helped me to get out.

          Jörgenundefined Offline
          Jörgenundefined Offline
          Jörgen
          Instructor
          wrote on last edited by
          #4

          But usually the satnav follows the treet in normal speed until the exit.

          Hardware
          iPhone 12 pro (iOS 17.0.2)
          Oukitel RT3 (Andr. 12)
          Samsung Galaxy XCover 4 (Andr. 9 Pie)
          Wireless CarPlay mit (Elebest C650)
          Wired CarPlay (SEAT Arona - 2021)
          For more information, click here

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          • richtea999undefined Offline
            richtea999undefined Offline
            richtea999
            wrote on last edited by richtea999
            #5

            GPS won't work unless you have line-of-sight of 4 or more satellites. You're not going to get that in a tunnel.

            I suspect the encumbent satnav makers have marked the tunnels in some way, and when you enter that segment of road they then make some sort of assumption about your average speed through the tunnel to keep your position approximately correct.

            I can't see any other way of doing it (unless there's WiFi in the tunnels to locate you).

            i.e. what Jörgen said - much more succintly than me!

            Corjan Meijerinkundefined 1 Reply Last reply
            0
            • Jörgenundefined Jörgen

              Hi, what I forgot in my list after the trip to Norway.

              The Here map did not show tunnels and there are a lot in Norway.
              I have not noticed how it is in other countries, may be you can report.

              The other problem was, if the tunnel is very long (and there some in Norway) then first the position arrow follows the street, but after some time (10min) it stops moving and the map starts to turn around to left, to right until you are out of the tunnel again.
              If for example there is an exit or a roundabout, you have no idea where to drive.

              IMG_4318-s.JPG

              Corjan Meijerinkundefined Offline
              Corjan Meijerinkundefined Offline
              Corjan Meijerink
              administrator
              wrote on last edited by
              #6

              @Jörgen thanks for sharing! Long tunnels will always be an issue. 10 minutes in a tunnel is extreme.

              When I was driving through a Swiss tunnel a few months back, both our app and Google Maps stopped positioning correctly in a tunnel after a few minutes at almost the same time!

              The app guesses your position as soon as you enter a tunnel and the signal weakens. This is a HERE SDK feature. After some time, it just becomes way too unsure to guess and without GPS, it won’t ever know for sure.

              Luckily tunnels are always one entry / exit. Well….then there is this in Norway 😉

              Nothing to do about it really 😞

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              • richtea999undefined richtea999

                GPS won't work unless you have line-of-sight of 4 or more satellites. You're not going to get that in a tunnel.

                I suspect the encumbent satnav makers have marked the tunnels in some way, and when you enter that segment of road they then make some sort of assumption about your average speed through the tunnel to keep your position approximately correct.

                I can't see any other way of doing it (unless there's WiFi in the tunnels to locate you).

                i.e. what Jörgen said - much more succintly than me!

                Corjan Meijerinkundefined Offline
                Corjan Meijerinkundefined Offline
                Corjan Meijerink
                administrator
                wrote on last edited by
                #7

                @richtea999 correct. Your location is extrapolated based on the tunnels coordinates and your estimated speed.

                1 Reply Last reply
                -1
                • Jörgenundefined Jörgen

                  Hi, what I forgot in my list after the trip to Norway.

                  The Here map did not show tunnels and there are a lot in Norway.
                  I have not noticed how it is in other countries, may be you can report.

                  The other problem was, if the tunnel is very long (and there some in Norway) then first the position arrow follows the street, but after some time (10min) it stops moving and the map starts to turn around to left, to right until you are out of the tunnel again.
                  If for example there is an exit or a roundabout, you have no idea where to drive.

                  IMG_4318-s.JPG

                  Hubert Thoringundefined Offline
                  Hubert Thoringundefined Offline
                  Hubert Thoring
                  wrote on last edited by Hubert Thoring
                  #8

                  @Jörgen : das Bild kommt mir bekannt vor, mit dem Signal und verhalten auf der Karte auch, da hilft sich auch Richtungen bzw. nächste Ziele zu merken ..

                  In den meisten Tunneln lief es aber sehr gut habe mich oft gewundert das es noch ging !!

                  Wars dieser hier … An der Großen Brücke

                  IMG_2669.png

                  VG 👋

                  VG Hubert
                  Info zum Beta Test "Next App" dazu die Hardware ...
                  iPad 9. Generation iOS 18.5 / Handy iPhone Xr iOS 18.5 / PC mit MS Win11 / BMW Connected App mit Cradel.
                  ❗️MyRoute-App im Cradel und Remotek-One❗️

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                  • Jure Sirena 0undefined Offline
                    Jure Sirena 0undefined Offline
                    Jure Sirena 0
                    wrote on last edited by Jure Sirena 0
                    #9

                    Using every day underground rondabout and underground exits in Barcelona city (on the Ronda)

                    Example of one ‘double decker’
                    https://maps.app.goo.gl/r1myiQ5kqrY42uQ66?g_st=ic

                    1 Reply Last reply
                    0
                    • Con Hennekensundefined Offline
                      Con Hennekensundefined Offline
                      Con Hennekens
                      wrote on last edited by
                      #10

                      It might (I am not sure) also depend on your hardware. As far as I know (and I am not sure 😉 ) Google location services uses GPS (obviously) but also uses compass (a REAL one, not the GPS extrapolated ones, some phones have REAL compasses) and even gyroscopic hardware (if available).

                      Maybe this could be one of the seldom occasion on which the "enhanced accuracy" settings would be helpful, since that uses GSM and wifi signals too. Those probably are available in some tunnels. But I have never been to Norway (yet 😉 ).

                      I am just an enthusiastic MRA user, and hope you will be one too!

                      Most motorcycle problems are caused by the nut that connects the handlebar to the saddle.

                      Streetpilot 2610 / Zumo 660 / Zumo 395 / CAT S52 + MRA app

                      1 Reply Last reply
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                      • Jörgenundefined Offline
                        Jörgenundefined Offline
                        Jörgen
                        Instructor
                        wrote on last edited by
                        #11

                        Anyway, I just wanted to pass along this finding. I am not a programmer and have no idea how to do something like that, but I could imagine that after losing the GPS signal and after info of the map data, one is in a tunnel, that then a routine with the normal average speed drives through the tunnel, eventually a departure takes if necessary and one comes out so about the same time at the exit.

                        Hardware
                        iPhone 12 pro (iOS 17.0.2)
                        Oukitel RT3 (Andr. 12)
                        Samsung Galaxy XCover 4 (Andr. 9 Pie)
                        Wireless CarPlay mit (Elebest C650)
                        Wired CarPlay (SEAT Arona - 2021)
                        For more information, click here

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