New – Premium Gmapsupp.img – directly for Garmin GPS units

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As Garmin does not seem to fix MapInstall on Windows anytime soon - I've now also made all countries except Europe continent and Asia continent (they are too big) available as gmapsupp.img download - which after unpacking - you can directly move onto your GPS device.

Actually for Mac OS x - there is a new version of Basecamp 4.8.3 - which includes MapInstall 4.3.1 beta - and according to first info I have received - that seems to be fine and send maps without problems. If I don't here of problems soon - I will also update the articles on the website and remove the warnings for Mac OS x users.


Directly using gmapsupp.img downloads . you lose the possibility to only upload a part of a map to your device as you could do using MapInstall (or Mapsource for Windows users). The advantage is that you can very quickly change the layout (on both Windows, as well as Mac OS x or Linux), and that it's the quickest and easiest way.

If you want to use the maps for planning on your desktop - then you will need the Desktop map too or instead. Note: If you plan a route in Basecamp on your desktop - you should use exactly the same map on your device (so same date, same country - but Unicode/Non Unicode does not matter - so you could use Non Unicode map on your GPS device if needed, and Unicode map on your Desktop/Notebook)


The Gmapsupp.img downloads are available for all countries/continents except for Europe continent map and Asia continent map - which are simply too big.

The contourlines are packed into separate gmapsupp.img files - so when updating you do not need to download them again.

The downloads come with scripts included for easy changing of the layout. The scripts run on Microsoft Windows (cmd.exe) respectively Apple Mac OS x and Linux (bash). This way you can adapt the layout of both the contourlines and the maps themselves. For everyone who had problems with too thick or too thin contourlines on his Garmin GPS device - this opens up a quick solution.


The gmapsupp.img downloads are available for free to all active OpenMTBMap respective VeloMap Members.


13 comments to New – Premium Gmapsupp.img – directly for Garmin GPS units

  • Trurl

    Du schreibst: „Für Apple Mac OS x hat Garmin letzte Woche ein Update von Basecamp auf 4.8.3 bereitgestellt – welches mit MapInstall 4.3.1 beta kommt. Nach ersten Infos die ich bekommen habe – scheint diese Version von MapInstall nun wieder problemlos zu funktionieren. Wenn ich weiterhin nichts von Problemen höre – werde ich für Apple Mac Os x Benutzer die Warnhinweise also bald von der Homepage entfernen.“

    Bloß nicht!

    Aktuell wird die Version 4.8.4 von BaseCamp für macOS angeboten. Vor deren Benutzung kann ich nur warnen! Zwar ist sie endlich in 64 Bit kompiliert, aber erstens setzt sie mindestens macOS 10.13 voraus, zweitens routet sie sehr seltsam (über irgendwelche Trampelpfade statt über Radwege) und drittens und vor allem: Sie ist unbenutzbar langsam! Wenn man einen Track mit dem Mauszeiger greifen will, dauert es mehrere Sekunden, bis man ihn zu fassen bekommt. Neuberechnung von Routen dauert ewig usw.

    Das neue MapInstall habe ich noch nicht ausprobiert, aber BaseCamp ist in dieser Version definitiv unbenutzbar.

  • gordonparker

    Thanks Felix; I should have checked what version I have! And the clear instructions are much appreciated.

  • gordonparker

    Images attached re my previous post

  • gordonparker

    I thought I had downloaded the file (for Italy) correctly to a micro SD card – see screenshot – but no map shows on my GPSMAP64S when I enable it. It is the only map indicated. The outline map of Italy appears but there is no detail when I zoom in.
    Can you advise what I am doing wrong?


    Hello Felix,

    After receiving the info about changes of Mapinstall I am in a dark hole.

    I have planned to go to the US, the traces and some routes are ready but now I have problem how to send the maps of the US to my gps device ( Dakota 20).

    Reading your info I am not able to find the solution and even don’t find the maps of North America.

    My softwer : Windows 8.1, Base Camp 4.6.2 , Mapinstall from 2016 March

    Looking for your help,


    • extremecarver

      There is no map of North America – you have to scroll down to North America continent – and then you find several US maps and a map of Canada. (you could also downgrade Mapinstall instead of using the gmapsupp.img files). They are only available in local language – as local is english anyhow – so do not look in the english section!

  • okraftdd

    Hallo. Weiß jemand spontan, ob die Karte für die Garmin fenix 5x Plus interessant ist?


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