@caspertone,
I still do not understand why you are still having problems?? Instead of this "computerteddy map site"go to sites where you can get a installer version of the map you need.
Like the one I posted for you as the example of France.
As for converting "IMG" files to "Mapsource" installs with "GMapTool" it is so easy to do.
But I would just stick to install versions of any Open Maps you need and there are lots of sites that have these install versions of maps.
Seeing that your knowledge of "Garmin maps" is very limited. Then learn first with easy installer maps to be used with "Mapsource".
Learn how "Mapsource" works first then go on to Making Map install versions with "GMapTool".
Plus I do not understand why you just don't use the complete "IMG" file on your GPS Unit. If you do not have room on the memory side then put an SD card in the GPS with the map on it.
As you have not told anyone what Garmin GPS unit you are working with.
I have never had any problems zoom levels working with "Mapsource" or on any of my Garmin GPS Units.
In fact I have never even tried to change and zoom levels. I just use the default both in "Mapsource" or any of my Garmin GPS Units.
Been using Garmin since 2007 and have no need to change any thing about the Openstreet maps I download and use.
Every 6 months or so I update each of the maps I use.
As today I have 24 different Openstreet maps from different sites that I use.
Example:
BeluLux I have 7 different Openstreet maps.
When setting up tracks I switch between different maps some give more details then others.
Some show more details of bike trails others show more details of dirt roads others show more details of POI's in the area.
On "Mapsource" I work with Zoom level 1KM down to 300m when making a track to be used. Any lower that 300m I start to lose some roads and bike tracks.
Plus never going higher than 1km when looking on the map.
When on a hiking trail I sometimes zoom in if Geocache area for more detail.
But default zoom levels have always worked for me.
This is the zoom levels I work in when making tracks in "Mapsource".
When picking tiles to make an IMG file I go to 15km zoom level as shown in my earlier post.
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