[aprssig] Public Icon Set (overlay location)

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Tue Oct 8 10:06:57 EDT 2013

And where do these two bits come from?

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

On 10/8/2013 8:23 AM, Robert Bruninga wrote:
> One thing to consider is Overlay characters.
> Originally in APRSdos the overlay characters were drawn over the 
> symbol itself and those symbols were drawn to have a clear spot in the 
> center.
> Then in the Kenwoods, we suggested placing the overlay character in 
> the upper left corner so that they could appear over any/all symbols.
> In any new system I suggest 2 bits be allocated to indicate where the 
> overlay character is drawn.  Upper left, Upper right, center, or none. 
>  "None" can be used when a client that has defined a separate symbol 
> for a given overlay combo because it does not then also need to draw 
> the overlay character.  Though if there is room, it would help human 
> understanding across platforms if the overlay character was also 
> obvious on the new special symbol.
> Bob, WB4APR
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