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[aprssig] APRS RFID in Hara Arena on APRS.FI

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Tue Feb 16 19:21:34 UTC 2010


It looks like you created the objects in one location and then moved 
them to their current locations?  I've captured how these objects look 
in APRSIS32 at various zoom levels and posted them to 

To get them to actually touch one another, the zoom is 110 feet for the 
diameter of the circle (upper right corner).  At that zoom level, 
maximizing the window on my 1920x1400 laptop screen still only gives 196 
feet of vertical space.  So with a map that covers the entire arena, I 
suspect there's not enough room to show stacks at each location, even 
with a large screen.

Great idea though, and I'm anxious to see how it all comes out.  Who 
knows, it might even get me to add a toggle-option to my client to show 
or hide callsigns next to the icons!  Especially when I expect most of 
them to be people walking!

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

PS.  To download my client, join the APRSISCE Yahoo Group at 
http://groups.yahoo.com/group/APRSISCE/ or just click the link at the 
top of the thumbnail page above.  It's free!

PPS.  If you haven't seen these on APRS.FI yet, here's a direct link:

http://aprs.fi/?lat=39.8215&lng=-84.2567&mt=m&z=19&timerange=86400 (only 
good for 24 hours unless Bob is refreshing the objects)

Robert Bruninga wrote:
> RFID on the map!
> Zoom into Hara arena (Dayton Ohio) 3949N 8415W and you will see
> 10 RFID simulated objects in the HARA arena.  They are spaced
> every 15 feet using the !DAO! Format and apparentlly APRS.FI can
> resolve them just fine.  
> The APRS RFID spec has now been updated to rev4 with the
> addition of the additional parameter indicating if the person
> was walking over, stepping on or standing at the HotSpot RFID
> reader.  See http://aprs.org/aprs-rfid.html
> So, the APRS infrastructure is completely ready to begin
> receiving and displaying RFID locations.  Now all we gotta do is
> assemble the Tag-Trackers as I call them, one at each door or
> location... And we can add this very powerful APRS capability to
> our toolbox.
> Bob, Wb4APR

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