On 17/12/2012 03:43, Andre von Biel wrote:
Hi All ,
  I am a newcomer to "talk" so please forgive any procedural errors.
I live in Christchurch, New Zealand and my wife and I take frequent
holiday trips to the Polynesian Islands and Australia. I use Garmin
etex VISTA HCx and try to get OSM maps to wherever we plan to go.
Much to my joy I discovered that at: http://garmin.openstreetmap.nl
I should be able to get all the map segments I need for a grand and
glorious South Pacific Map.
The above statement is almost correct:
1. All maps East of the International date line are OK in all respects
2. As soon as I cross the dateline to the West the maps appear to be OK
at large area resolution, but ALL detail (including the map) disappear
at distance resolution of about 50 Km and smaller.
3. The above problem appears to be confined to a vertical strip of
western longitudes, starting at the date line and reaching as far west
as north-east New Zealand, the Fijian Islands, etc.
Although I can not be 100% positive about this, the South Island of New
Zealand is OK, as is the western portion of the North Island, i.e., west
of Lake Taupo. Further tests have shown that Tasmania and eastern
Australia are OK.
The problem stated above exists whether I have my map assembled by the e
OSM people or if I download individual *.img Maps
Can anybody through some light on this problem?

It has been discussed on the forum before. There does seem to be a
problem with those Garmin maps at around 180 degrees, so it affects New
Zealand and other places.
See these threads: http://forum.openstreetmap.org/viewtopic.php?id=9809
http://forum.openstreetmap.org/viewtopic.php?pid=166179#p166179

I don't know if anyone has figured out what's causing this, or how to
fix it.

You could try some other OSM based maps, or try producing some maps
yourself. See http://wiki.openstreetmap.org/wiki/OSM_Map_On_Garmin

Craig

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