[aprssig] Waypoint truncation
bruninga at usna.edu
Mon Feb 6 06:05:33 CST 2006
>>> scott at opentrac.org 02/05/06 3:16 PM >>>
>But I'm planning to drop dashes and truncate
>from the right.
You can't do that. If you truncate from the right
then the GPS cannot distinguish WB4APR-1
from WB4APR-3 from WB4APR-7 from WB4APR-9.
If you truncate from the right, then the result is
that the 6 character "WB4APR" would appear to
be In Annapolis at one instant, then in
Baltimore a few minutes later, then at the Naval
Academy a few minutes later, and then in Severna
Park a few minutes after that.
The GPS track would be hopeless as well as
anyone trying to make any sense out of it
on the screen. That is why we had Kenwood
truncate from the left.
But your idea of eliminating the hyphen will
work, because it retains the right-justified
uniquess of each station... de Wb4APR, BOb
> On 2/5/06, Scott Miller <scott at opentrac.org> wrote:
> > What does everyone think of the waypoint name truncation as
> practiced by the
> > Kenwoods? Their method of handling names greater than 6
> characters (or
> > whatever the limit is set to) is to use only the rightmost
> n characters. So
> > KB6YUO-15 becomes YUO-15, and N1VG-11 becomes 1VG-11.
> > I guess the scheme makes sense, because at least you're not
> likely to
> > overwrite a -1 station with a -15 and vice versa. For my
> new tracker I'm
> > considering adding the extra step of removing the '-' if
> the name won't fit.
> > That way, N1VG-11 would become N1VG11. KB6YUO-15 still
> wouldn't fit, but
> > you'd still get an extra character, as 6YUO15.
> > Any suggestions for other ways to handle long names? And
> do any receivers
> > support between 6 and 9 characters? All of the units I've
> tested have
> > either supported only 6, or 9 or more. Also, is anyone
> using a Kenwood in
> > Magellan output mode?
> > Scott
> > N1VG
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