[mkgmap-dev] Change in Garmin IMG format?

Tue Jul 13 09:50:40 BST 2021

That is very interesting and somewhat disturbing. There is one unknown 
byte (at 0x65) in a typ file's header which might be worth investigating 
. The header is higher than mkgmap's  0x5B  with values ranging between 
0 and 1F.(In TYPWiz6 you can change this in Settings,Advanced,Region)

Topo Austria has 0x0e and Topo Italia 0x0F

However,this may have nothing to do with the issue.

On 13/07/2021 07:30, Felix Hartmann wrote:
> No they haven't changed the img format, what they did is that for 
> years they designed the maps in layout for desktop size displays, and 
> finally discovered maps should be much higher contrast on small 
> displays. So they introduced (already sind 2-3 years) a high contrast 
> layout that is more and more independent of the .typ-file layout. 
> Since the newest update this is even more noticeable.
>
> It can be deactivated by selecting classic map design or similar. 
> While high contrast or mountainbike or whatever will use the new layout.
>
> On Tue, 13 Jul 2021 at 04:44, ET Commands <etcommands at gmail.com 
> <mailto:etcommands at gmail.com>> wrote:
>
>     I'm not sure if my message is relevant to this discussion list or not.
>
>     I own an Edge 1030 and I use mkgmap to make custom maps for it.
>     Recently
>     Garmin provided a firmware update for the 1030 (ver. 12.0). After I
>     installed it none of my custom POI symbols appear on the map. In
>     addition, the default Garmin POI symbols have been updated by Garmin.
>     All my custom line and polygon symbols still display.  I saw comments
>     from some users in the Garmin forums that TOPO maps will no longer
>     work
>     with the firmware update either.
>
>     It appears Garmin may have revised the format of their IMG files, if
>     only slightly.  I don't know if this affects all Garmin models or
>     only
>     certain ones.
>
>
>     Mark
>
>     _______________________________________________
>     mkgmap-dev mailing list
>     mkgmap-dev at lists.mkgmap.org.uk <mailto:mkgmap-dev at lists.mkgmap.org.uk>
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>     <https://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev>
>
>
>
> -- 
> Felix Hartman - Openmtbmap.org & VeloMap.org
>
>
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