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[aprssig] conveying map view

Bob Bruninga bruninga at usna.edu
Tue Sep 21 21:55:30 UTC 2004


On Tue, 21 Sep 2004, Curt Mills wrote about the auto-map-zoom...

> I can see the usefulness in that.  It shouldn't be hard to add that
> to Xastir.  We already have a way to specify map center/zoom, so
> we'd just have to put in a special message type to push that out,
> and to decode it.
>
> How best to do that?  Group message?  Directed message to a
> particular station?  Query?

In the mean time, you might consider just adding what APRSdos does,
that is, always center on a station sending PRIORITY or EMERGENCY.
Yes, its only part of what Wes asked for, but its trivial.

I would recomend that such auto-centering should also be combined with a
range scale setting of 16 miles if presently over that.  This seems to
match the high density on the East coast and make the "centered" station
visible amongst all the others..

> Would we want a list of the map files to go across as well?  That
> could get very long/time-consuming across the air.

No too much data.

Id say a human readable format would be best.  Hence a message, hence
somehting like this in a message or bulletin or whatever:

  "Pse view xxxxN/yyyyyW @range 16."

I think to the nearest mile is adequate for this application...
Bob






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