Hi Gerd,
Probably the solution is to use background polygon trimmed by
country/region area. I think GPS look for background at current position
to determine which map to use for a search. Some GPS allow to select
map, but mostly it goes automatically, GPS selects a map and then
doesn't look for another, even if there is no hits. So near the border,
where tiles overlap, GPS can select a tile from a wrong map.
I hope that trimmed background could make a clean division at the
border, even if tiles coordinates overlap.
--
Best regards,
Andrzej
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