[EAS] EAS in the County?

[Sean Donelan]

On Tue, 4 Jun 2019, Barry Mishkind wrote:
>        More often that it should. I"ve been writing for
>        years about this issue, but it seems no one
>        on any side of EAS wants to talk about this.
>
>        If you don't know where Manker County is,
>        how can you be safe?

That's why I'm interested to learn how Apple iPhone and Google Android 
plan to implement WEA 3.0 geo-fencing from the CAP message.

Smartphones keep a local cache of recently used map tiles, obtain the 
GPS location of the phone/mobile device, and the new ATIS WEA 3.0 
standards add the polygon/circle to the transmission.  The local map 
cache metadata could have FIPS codes, since FIPS geocodes are 
relatively tiny compared to the rest of the map metadata. The next-gen 
smartphones have a lot of local storage, so you don't need to transmit as 
much map information over the air.

In theory, smartphones should be able to indicate the distance and 
direction between the user's GPS location and the geofenced warning area. 
If recent local map tiles are still cached, can display the "You Are 
Here" indicator on the map with the warning area marked.

But I don't know Apple's and Google's smartphone roadmaps.

Likewise I don't know HD Radio, ATSC, etc. roadmaps.