[Xastir] An idea for pos error correction

[Curt, WE7U]

On Sun, 12 Dec 2004, James Jefferson Jarvis wrote:

> On aprsworld I just compare dP/dT to a fixed value ... if the change in
> position divided by the change in time is too big, then I skip the plot
> point. There's a few more corner cases, but it seems to work okay.
>
> -Jim KB0THN
>
>
> On Sunday 12 December 2004 11:27, Kurt A. Freiberger wrote:
> > Occasionally, I get positions that have been corrupted, where the
> > apparent position of a station is WAY off the map.  Now, I know that
> > WD5IYT-2 hasn't run off onto Kansas; it's a digi.  So, for those
> > stations being displayed, could the positions be tracked (since the info
> > display shows several previous positions), and any outlandish positions
> > be dropped?  It'd sure clean up the trails.  I can see where it would
> > eat memory like a Great White potentially; but maybe the database would
> > be already available?  Sounds like a fuzzy logic solution...
> >
> > Just thinking, letting the coffee sink in...
> >
> > 73/Kurt

Xastir has a way to clean up trails already.  Look in the
Configure->Timing dialog for New Track Time and New Track Interval.
If either of these are exceeded, the trail doesn't get drawn.  The
point still gets plotted/saved though.

--
Curt, WE7U.   APRS Client Comparisons: http://www.eskimo.com/~archer
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