[aprssig] APRS-IS Object Filter Syntax
Peter Devanney
lists at devanney.ca
Mon Apr 22 08:57:47 EDT 2013
Keith, Lynn
Thanks for the suggestions. Will try these.
Sounds like using a standardized object name prefix should do the trick.
Peter VA3YOW
On Friday, April 19, 2013, Keith VE7GDH wrote:
> Peter VA3YOW wrote...
>
> I would like to filter objects by 1) name and 2) Distance if possible
>> I have tried the o/ command using it similar to p/ but didn't work.
>> Anyone know what o/ syntax will work to filter specific object
>> prefixes and or distances?
>>
>
> It might be worth looking at the "type" filter...
>
> ------------------------------**------------------------------**
> ------------
> Type Filter
> The type filter will pass traffic depending on the packet type.
> More than one type can be defined in one single command. You
> can also limit this to a distance around a station or object.
>
> Syntax: t/type
> t/type/CALL/dist
>
> Where: t = type command
> type = is one or more of the following letters
> p = Position packets
> o = Objects
> i = Items
> m = Message
> n = NWS Weather and NWS Area Objects
> w = Weather
> t = Telemetry
> q = Query
> s = Status
> u = User-defined
> CALL = callsign of a station or name of an CALLobject
> dist = distance in km from CALL to pass this type
>
> Samples:
> t/p This will pass all traffic with a position
> t/w This will pass all weather traffic. For
> positionless weather objects the corresponding
> position packet will also be sent when it is
> next heard
> t/mos This will pass all messages, objects and status traffic
> t/p/SM5NRK/500 Pass all position packets within 500 km
> from last known position of SM5NRK
> ------------------------------**------------------------------**
> ------------
>
> You could request objects within X km of a particular station.
>
> Of course, if you know the name of the objects, you could just
> use the object filter and request specific objects. However, the
> type filter would allow you to fetch certain objects based on
> their location without having to know the exact name of them.
>
> 73 es cul - Keith VE7GDH
> www.ui-view.org
> --
> "I may be lost, but I know exactly where I am!"
>
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>
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