[aprssig] Position Ambituity in APRS!

Curt, WE7U archer at eskimo.com
Tue Jan 8 12:22:29 EST 2008

On Tue, 8 Jan 2008, Steve Dimse wrote:

> So, think of ambiguity as representing a circle, taking the center of
> the polygon described by the lowest and highest values of the missing
> digits, and with the radius of the magnitude of the missing digits.
> So much easier to have simply added, say, /PE for position error,
> followed by a few digits documenting the uncertainty. But no...

Yes.  This would have made very good sense in the protocol.  Perhaps
with with the addition of random placement of the center for those
people that actually have an accurate positional sensor but don't
want to convey their exact location.  Kill two birds with one stone.

Curt, WE7U: <www.eskimo.com/~archer/>     XASTIR: <www.xastir.org>
  "Lotto:  A tax on people who are bad at math." -- unknown
"Windows:  Microsoft's tax on computer illiterates." -- WE7U
The world DOES revolve around me:  I picked the coordinate system!

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