Order Tray | Contact Us | Home | SIG Lists

[aprssig] Re: TIGER maps what-s the problem?

Chris Howard w0ep at frii.com
Fri Jun 16 18:58:24 UTC 2006

On Fri, 2006-06-16 at 12:23, Jason Winningham wrote:
> On Jun 16, 2006, at 12:37 PM, Robert Bruninga wrote:
> >>>> jdw at eng.uah.edu 06/16/06 9:16 AM >>>
> >> What you just implied, Bob, is that if I create some horrendously
> >> inaccurate APRSdos map, then it is _your_ fault, as the APRSdos
> >> developer, for not telling the user...
> >
> > Yes!... and that is why APRSdos automatically assigns ambiguity in
> > EVERY transmitted position based on the scale of the map in use
> > by the initiator of position information.
> This is nonsense.  If I know my position and enter coordinates, the 
> scale of the map I'm viewing when I enter or transmit the data has 
> absolutely _nothing_ repeat NOTHING to do with the accuracy of those 
> coordinates.
> The scale at which I'm viewing the map is also completely unrelated to 
> the accuracy of that map data.

Bob's scenerio works good if you imagine the user _selecting_ his
position on the map using the software.  So it is a type of posit,
and it would be good to have some assigned ambiguity to such.
It's a posit problem, not a map data problem.

I'm not sure how the hand sketched map fits in the scheme of things.
(The fog rolls back in.)

More information about the aprssig mailing list