Just make a map of Cyprus and check if you get greek in the South, and Turkish special characters in the north. The Latin alphabet without special characters like ö or accents is covered in nearly all codepages.

On Wed, 4 Aug 2021, 07:15 7770 <7770@foskan.eu> wrote:
Hi.
i have made maps using the --code-page=65001  option.
Maps are read just fine by GPSMAP 66st with all firmwares i have had (at least
since 4.xx up till 7.60).

Could there be something overriding this setting and not making the map
unicode, is there a way to check what the map really is?

i use map data from geofabrik.de.

regards
Karl


On tisdag 3 augusti 2021 kl. 17:59:15 CEST Andrzej Popowski wrote:
> Hi Marek,
>
> I have tested on 66st firmware 7.20. Unicode maps compiled with mkgmap
> are rejected, the same message as you have found on issue 26 - "Cannot
> authenticate maps".




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