[OZAPRS] Message Traffic and WX Alerts in Xastir

[Andrew Errington]

Hi David,

You appear to have confused me with someone who knows what he is doing.

I have found this page[1] which describes what an .xbm file is, and how to
make one, but I don't yet know how the XASTIR weather warning mechanism
works.

I wonder, since the weather warnings are triggered by incoming APRS
messages would it be possible to construct some sample APRS messages which
would have known effects?  This would be great for testing- just inject
these messages into XASTIR and observe that the correct result appears.

Anyone?

73,

Andrew

[1] https://people.scs.fsu.edu/~burkardt/data/xbm/xbm.html

On Wed, November 26, 2008 17:29, David wrote:
> Hi Andrew......ive been getting areas with Yellow and Flood for some
> time now....also was getting Blue Alert at one stage..... at the moment we
> have large areas with STS Severe Thunderstorm Storm warnings.... i note
> that in the /usr/local/share/symbols dir there is no .xbm for
> Thunderstorms...would this cause them not to be shown up as colored
> areas as they are in UI-View  (Red)...if this is so how would one go about
> making a .xbm for Thunderstorms.....have tried to change the file name of
> the Tonado one to see if it worked ...nix... how  does the .shp file pick
> up which warning and what it is from
>
>
>
> 73 David VK4BDJ
>
>
>
>
> Andrew Errington wrote:
>
>> I did a quick experiment.
>>
>>
>> I have made my own .dbfawk files for the map data from here:
>>
>>
>> http://mapcenter2.cgpsmapper.com/mapsetview.php?id=185
>>
>>
>> (You can get maps of Oz too, but for any of these files you have to run
>>  cgpsmapper first to convert to shapefiles).
>>
>> I used QGIS to examine the list of fields, and entered that list as the
>>  dbfinfo line in the .dbfawk file.  Unfortunately I couldn't get XASTIR
>> to recognise my .dbfawk, so I moved the .dbfawk file to the maps
>> directory (to the same directory as the shapefiles) and gave it the same
>> name as the shapefile.  It worked.
>>
>> Today's quick experiment was to move the files *back* to the /config
>> directory and try and get them to work.  When I did that XASTIR reported
>>  its "No DBFAWK signature for..." error, but then I selected Map|Index:
>>  Reindex all maps, and viola!  The .dbfawk files were found and used.
>>
>>
>> The second thing I did was to edit the dbfinfo line and change all the
>> field names to uppercase (I already had them as lowercase).  This did
>> not seem to make a difference, which implies that the dbfinfo line in
>> .dbfawk
>> files is case-insensitive.  I would like to verify this with the source
>> (or by asking someone who knows for sure).
>>
>>
>> It might also be useful to point out that you can tweak the .dbfawk
>> files while XASTIR is running.  XASTIR reads them every time it re-draws
>> the map, so your changes are visible without having to quit and restart
>> XASTIR.
>>
>>
>> Hope this is useful.
>>
>>
>> 73,
>>
>>
>> Andrew
>> ZL3AME
>>
>>
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>>
>>
>
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