[aprssig] APRS-IS Object Filter Syntax

Peter Devanney lists at devanney.ca
Mon Apr 22 07:57:47 CDT 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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