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[aprssig] APRS 1.2 expanded symbol set

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Mon Sep 19 21:31:51 UTC 2011


As soon as we get some graphic artists to draw up actual bitmaps (I know 
Bob, you don't like bitmaps, but it's what the rest of the world uses) 
for the new special combos as well as whatever the "BASE symbol for the 
overlays" is.

Why can't the latter just be the current alternate table symbol for any 
software that doesn't understand the new definitions?

Why suggest/require changing the base representation in the existing 
alternate table?

I mean, if you do that, then a non-overlayed use of the symbol will be 
different between new and old software.  You're saying that new software 
should use the EXISTING alternate symbol for a non-overlayed station, 
but non-changable software should have the non-overlayed symbol changed 
for the new "BASE symbol for the overlays"?

Why not just let the latter alone so that non-overlayed uses look the 
same no matter where they're viewed from and only newer overlay-aware 
applications actually see the new definitions?

Otherwise, I'm coming to understand your intent with the corrected words.

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

On 9/19/2011 5:16 PM, Bob Bruninga wrote:
> Your second paragraph is correct.  The new definitions expect the original
> symbol in the primary table to always work.  Then a new overlay on an old
> system will put the overlay on the old secondary symbol.  But NEW software
> should know the difference.  IE, the following guidance to authors:
>
> If the TABLE character is "/" use the old primary symbol
> If the table character is "\" use the old secondary symbol
> If the table character is any other overlay, use the NEW BASE OVERLAY symbol
> for that combo...
> AND/OR, if SPECIAL COMBO's have been defined in the
> aprs.org/symbols/symbol-new.txt file, then feel free to include additional
> unique symbols for each unique combo you feel worth it.
>
> In the case of old non-modifiable software like UIview, the symbol needs to
> be updated to indicate it is overlayable, and then the new "BASE SYMBOL for
> the overlays" needs to replace the original secondary symbol appearance.
>
>> If you attempt to do an overlay on Portable, existing clients
>> (and even new clients) won't see an overlayed tent, but will
>> be presented with an overlayed picnic table, NOT what you have
>> in mind, but of course I could be mistaken.
> Yes, I am accepting the fact that a picnic table and a tent are close enough
> to imply something out in the field, and so overlaying a character on either
> will convey about the same meaning.  That is why I went ahead  on this one.
> And did not mess with the Eyeball as you correctly pointed out.
>
> Hop[e that can work...
> Bob, Wb4APR
>
> -----Original Message-----
> From: Lynn W. Deffenbaugh (Mr) [mailto:ldeffenb at homeside.to]
> Sent: Monday, September 19, 2011 4:58 PM
> To: TAPR APRS Mailing List
> Cc: Bob Bruninga; APRS at yahoogroups.com
> Subject: Re: [aprssig] APRS 1.2 expanded symbol set
>
> On 9/19/2011 4:14 PM, Bob Bruninga wrote:
>> Lynn was right to point out how the EYEBALL overlays are already taken.
> So
>> the PORTABLE symbol is the best one we have for using overlays to indicate
>> types of special portable events.
> NO, NO, NO!  The Eyeball and Portable (Field Day) symbols are both
> PRIMARY table symbols and are NOT backward compatible with overlays!
> All of the previously proposed extended overlay definitions were based
> on an originally overlayable (read ALTERNATE) table entry.  (And it
> wasn't the Eyeball that was previously proposed as an overlay, it was
> the (alternate table) smokestack with related specifics of Haze, Smoke,
> Blowing Snow/Dust, and Fog as listed at
> http://www.aprs.org/symbols/symbols-new.txt).
>
> If you attempt to do an overlay on Portable, existing clients (and even
> new clients) won't see an overlayed tent, but will be presented with an
> overlayed picnic table, NOT what you have in mind, but of course I could
> be mistaken.
>
>> Since the October 2007 APRS1.2 re-alignment of sympbols was proposed,
> there
>> have been no substantive objections, so I am going to assume everyone
> agrees
>> and declare it approved.
> The hundreds of newly specifiable overlay meanings MUST (IMHO) be based
> on originally overlayable symbols from the alternate table.  Otherwise,
> please log my strenuous objection to the whole concept of the extended
> overlay definitions (which, incidentally are already implemented in the
> textual description of the symbols in APRSISCE/32).
>
> Am I the only one seeing this or am I mis-interpreting something here?
> Maybe it's just a naming thing, but you're not really overlaying
> "Portable" (the tent), but Park/Picknic (the table).  It's a big thing
> with respect to what people will see in all existing APRS client
> implementations.
>
> Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
>
>
>




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