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[mkgmap-dev] mkgmap-dev Digest, Vol 143, Issue 54

From Pierre Brico pierre.brico at gmail.com on Wed Jun 24 14:55:12 BST 2020

Hi Joris & Ticker,

Again thanks a lot for taking time to help me.

Google on the map maximum size, I've found this (

"The unit is reading from the memory card up to 4GB of map files. Is the
map bigger than 4GB the unit cannot read the maps. Any further capacity on
the SD card, depending on the device, can be used for other maps, pictures,
MP3 files and track logs. If the map on the memory card contains more than
2025 map tiles, the device cannot read the data, even if the map size is
less than 4GB."

So the 2G shouldn't be a problem.

I'm pretty sure that the problem is linked to the 66s. On my 64s, I've no
such issue. But as I said, as all tiles are present when I zoom in, it's
not a problem for me. I can live with that.

One last question, is there a good documentation about the style syntax ? I
would like to remove some details from my map (like the buildings but
keeping housenumber) but I don't know how to do that.

Thanks again,

On Wed, Jun 24, 2020 at 1:49 PM Ticker Berkin <rwb-mkgmap at jagit.co.uk>

> Hi
> Possibly related.
> Using the default style and default zoom levels, zooming out to display
> the whole of the UK took an age on my old device - the amount of detail
> in each tile at the outermost map is vastly more that the pixels
> available. Leaving it for a few minutes to draw everything just results
> in an unreadable mess. I guess it also uses a lot of the device memory
> to display so many tiles at the the same time.
> What I now have is an extra outer level that is a bit like the overview
> map, just shows sea/land, some borders, motorways and trunk roads and
> major cities.
> I have this in the mystyle/options:
>  levels = 0:24, 1:22, 2:20, 3:18, 4:15
> but command line option --levels="0:24,1:22,2:20,3:18,4:15" should
> override the specification in the style.
> Beware, adding an extra map level might make the map exceed 2G
> Ticker
> On Wed, 2020-06-24 at 10:48 +0000, Joris Bo wrote:
> > Hi Pierre
> >
> > I’m out of options or knowledge. Your osm-france-202006.img seems to
> > be 2Gb which is a few bytes away from the absolute max the devices
> > can handle. The only thing I can suggest is making 2/3 or 4 maps
> > instead of one big.
> >
> > Kind Regards,
> > Joris
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