[aprssig] Re:All APRS Digipeaters In The World (Almost!) MappedOn UIview

[rcluster at comcast.net]

UI-View draws a BLUE SQUARE around iGates that are sending out the iGate packet.

73........Ron........AC7TK



 -------------- Original message ----------------------
From: "Robert Bruninga" <bruninga at usna.edu>
> > > The problem is that there is no Multi Task symbol for the 
> > > station that does all 3 things Gateway / Node / Digi etc 
> > > Maybe a Multi Task symbol could be produced :-)
> 
> Igates send out an Igate status packet.  Most clients including
> Uiview, APRSdos and others use this to draw a special color
> circile around those stations so you can tell the Igates no
> matter what symbol they are using.  
> 
> TO resolve WX stations that have a high PHG range and also serve
> as digipeaters, APRSdos had color attributes for all symbols..
> Any symbol that was a DIGI was painted GREEN, and a WX station
> was painted blue.  SO a GREEN WX symbol is a combined DIGI at a
> WX station.  Or a DIGI symbol surrounded by a BLUE circle was a
> DIGI that happened to send out a WX packet.  Problem is, many
> APRS clones left out symbol COLOR attributes completely.
> 
> >> This is one place where a standalone KPC3+  or 
> >> UIdigi-equipped TNC2 has a real advantage over most 
> >> programs on a PC,  since you can set three 
> >> different beacon texts, each with it's own repetition 
> >> rate, path and symbol.into these devices.
> 
> APRS discourages oscillating POSIT packets such as that.  All of
> the LTexts have always been receommended t be the same.  The
> reason is that many clients are set up to LOG all "new" or
> "changed" posits, but to not log every copy of an unchanging
> posit.  This GREATLY reduces log HISTORY files.  But if a TNC is
> beaconing two different position packets (even if it is only
> becasuse the TEXT or symbol changes,), these are still changes
> and result in exhorbitantly long LOG files due to these
> oscillating posits.
> 
> Therefore, having oscillating position rpeorts from the same
> station-SSID are discouraged.
> 
> >> If a station at a single location sends several different 
> >> symbols alternately, they will wind up directly 
> >> on top of each other.  Only the most recently sent 
> >> one will be visible.
> 
> Which is another reason why it is discouraged.
> 
> I recommend that CLIENT software that wants to resolve multi-use
> symbols, should use the originally intended color atributes.  Or
> at least draw a different color circle around the symbol if
> multiple meanings are intended.  Such as the WHITE (or green)
> circle that both APRSdos and Uiview use around any station
> symbol that sends out an Igate status packet.  I wish Uiview had
> used WHITE, so that it could use a GREEN circle around any
> symbol that digipeats.
> 
> This does not need an APRS protocol change, but a local
> client-display fix to resolve..
> 
> Bob
> 
> 
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