My friend, who owns a Garmin GPSMap 60CSx, notified me of a character set
problem in a tile name of my map. I wasn't aware of the problem, because
my Edge 705 does not display map tile names. The tile Etelä-Suomi (Southern
Finland) appears as Etelä-Suomi, where the currency symbol ¤ is displayed
as a black diamond. Other ä characters in the gmapsupp.img are encoded as
the byte code 304 in octal notation.
The workaround should be simple: in mkgmap.args, write the ä as \304
instead of using UTF-8. But I would except the parameter to be translated.
After all, the style files are already interpreted as UTF-8. I think that
the right fix of this bug would be such that \u escape codes are expanded
before utf-8 to target character set translation, and hex and octal escape
codes (\xC4, \304) are expanded after the translation. That would also
allow us to embed Garmin control characters where desired.
Also, I would like to have some transliteration in the UTF-8 to cp1252
(latin1) translation. The Garmin displays many latin1 and cp1252 code
points as a black diamond, as I posted some time ago. We could avoid that
by translating those code points. I attempted to override the built-in
translation (in the JRE as far as I understood) some time ago, but
I must have patched the wrong place, because my changes had no effect.
Any hints, Steve?
Regards,
Marko
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