[aprssig] What is APRS, really? USA Coverage?

Lynn W Deffenbaugh (Mr) KJ4ERJ at arrl.net
Fri Oct 23 14:03:04 EDT 2020

Already done.   Just run APRSIS32 and set the following:

View / None - Get rid of everything
View / Transport / Digipeater - Shows all stations that have digipeated
Screen / PHG Range Circles / Full or Half

And if you want to see them darker, just crank up the opacity number in 
Screen / PHG Range Circles / Opacity

Of course, this relies on all the digipeaters actually including valid 
PHG information.

For instance, here's central Florida with 1/2 sized circles (good 
coverage for mobiles).  And you can see why tracking from Melbourne 
(WX4MLB-3, just north of ME) to Orlando (west of K4EOC) takes you 
through an APRS RF dead zone. As is most of the I-95 corridor up through 
Daytona Beach.  K4EOC is actually a digi, but doesn't beacon PHG 

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

On 10/23/2020 1:04 PM, Robert Bruninga wrote:
>     Apples and oranges sorta.  The APRS (thin line) map is just a plot
>     of actual position reports actually on the highways, not of
>     "coverage",.  Just widening each dot by 30 miles would still not
>     be a "coverage" map?
>     We need the overlapping plot of the PHG circles of all digipeaters.
> I bet Lynn could do that.
> Bob
>      [Go to Google Images and try "cell phone coverage maps" to get an
>     idea of just how much cell coverage has blossomed,... Then
>     contrast that with the thinner APRS coverage map at Bob's aprs.org
>     <http://aprs.org> site. That map was 2008 and I can't help but
>     think it's even skimpier now that APRS has shrunk.]
>     This is not to say APRS is not underutilized along with most other
>     forms of amateur radio, but I'd rather leave the discussion of the
>     reasons that is to others. The concept of APRS is a very, very
>     powerful system. As Bob has been saying for how many years, it
>     just needs to be thought of as something more than just location
>     tracking.
>      [Really, it is just location tracking despite the many other uses
>     that Bob has thought of that aren't really used. Think Voice
>     Alert, roadside traffic counting etc ...]
>     I loved it but its time has passed. Look at the traffic volume
>     trend on this group, for instance.
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