[aprssig] APRS-IS and metadata

Lynn W Deffenbaugh (Mr) KJ4ERJ at arrl.net
Thu Aug 17 04:46:51 EDT 2023

Are you asking for something like this?


It exists and is the new repository replacing Bob's old non-parseable 
ToCall list (http://www.aprs.org/aprs11/tocalls.txt) and adding 
additional meta-data about the platforms.

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

PS.  Here's what it has currently:

> Tocall index (tocalls):
>   * tocall: The APRS destination callsign allocated for an application
>   * vendor: Vendor / author string identifying either the person or
>     organisation producing the device or application.
>   * model: Device or software model
>   * class: A device class identifier, referring to the class index
>   * os: Operating system identifier
>   * features: Feature flags indicating optional features implemented
>     on this device
>       o messaging: The device is messaging capable
>       o item-in-msg: The device is capable of receiving APRS items in
>         text messages

On 8/17/2023 3:35 AM, Borja Marcos wrote:
> Hi,
> I am new to the list, I hope this is the right place to discuss this issue. This is not a complete proposal, of course,
> just a “weather balloon” ;)
> As many members will be aware, there is an effort underway to use LoRa modulation on 433 MHz for
> APRS. There are several open source projects which, as a plus, are based on dirt cheap and easy to obtain
> hardware,
> https://github.com/richonguzman/LoRa_APRS_Tracker
> https://github.com/dl9sau/TTGO-T-Beam-LoRa-APRS
> https://github.com/lora-aprs/LoRa_APRS_iGate
> There is also one commercial product available, picoAPRS LoRa. It is more pricey, but, well, all of us know
> that developing and supporting an actual product is hard.
> http://www.db1nto.de/index_en.php
> All of it is a bit ad-hoc now with no agreed standards (as far as I know). While some of the developers have
> agree informally to use APL?? device IDs for LoRa based equipment, not every developer is following that
> rule,
> As far as I know there are also other modems/phys used with APRS. For example VARA on HF.
> I think it would be great to add some metadata to the databses used by the APRS mapping applications including,
> as a minimum, a modem/phy identification (and frequency, which could be useful for HF) so that they can be
> more useful to study/check certain kinds of APRS activity.
> Right now, for example, there are dashboards relying just on APL??? device IDs.
> http://lora.ham-radio-op.net/?center=43.3508,-3.0499&zoom=12
> Another interesting possibility offered by a more flexible database model could be adding some metadata specific
> to certain modems. As an example, LoRa chips can provide RSSI and SNR data which could prove valuable for
> propagation/coverage studies.
> What do you think?
> 73,
> Borja Marcos / EA2EKH
> _______________________________________________
> aprssig mailing list
> aprssig at lists.tapr.org
> http://lists.tapr.org/mailman/listinfo/aprssig_lists.tapr.org

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