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[aprssig] Moving area

Matt Murphy matt.kc8bew at gmail.com
Sat Jun 6 03:08:58 UTC 2009


On Fri, Jun 5, 2009 at 19:46, Jason KG4WSV <kg4wsv at gmail.com> wrote:

> On Fri, Jun 5, 2009 at 5:35 PM, Matt Murphy<matt.kc8bew at gmail.com> wrote:
> > I will be participating in a county-wide disaster drill this month.  Is
> > there a way to plot a moving area instead of a point?
>
> Use APRS multiline objects.  As an example NWS storm plots are
> routinely injected into the APRS-IS and gated locally, so storm areas
> are outlined.  The outline is relative to the object, so it will move
> as the object moves.
>
> You'll have to move it, either manually or with a script of some sort.
>
> Since gas will expand, your script could even enlarge the area as time
> progresses.
>
> I know xastir handles these objects; not sure about other APRS apps.
> (check Curt's client comparison chart here:
> http://www.eskimo.com/~archer/aprs_capabilities.html )
>
> Clients that can't display the polygons (e.g. D700) should still plot
> the object itself, which would ideally be the center of it (or most
> affected area, etc).
>
> http://pages.swcp.com/~russo/APRS_Multiline_Protocol.html
>
> -Jason
> kg4wsv
>

On Fri, Jun 5, 2009 at 19:24, Robert Bruninga <bruninga at usna.edu> wrote:

> If your clients do Dead Reckoning like the original APRSdos,
> just put the shape on th emap as an object with a course and
> speed, and it should move on recepit on all clients that have DR
> enabled.  But most don't.
>
> Better way to be sure everyone sees it, is to manually move it
> periodically.  In the original APRS, just select it, move the
> cursor, hit UPDATE and its done.  You should not have to re-draw
> it each time, just select and move.
>
> Hope that helps
> Bob
> WB4APR
>
> Use anyone of the APRS shape symbols
>


I have UIView that I will probably use.  It is running the APRSdos maps.  I
am getting even better maps from our caounty GIS dept :-)  I hope to have
them for this drill.  I will test the shape symbols and look into an
enlarging area/time.

Thanks
-- 

73,
Matt Murphy, kc8bew
http://mcares.kc8bew.net
Muskingum Co. ARES EC
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