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 <[email protected] <mailto:[email protected]>> 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

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--
Felix Hartman - Openmtbmap.org & VeloMap.org


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