[aprssig] New Feature On My UIview Webserver Maps - U.S. Weather Warning/Watch Zones
Stephen H. Smith
wa8lmf2 at aol.com
Sat Dec 15 14:12:18 CST 2007
I have been experimenting with with some changes and updates to my
UI-Webserver. For some time, I have been using the webserver included
with UI-View to make maps of the APRS activity locally on 2 meters and
across the U.S. on 30M HF available to anyone on the Internet.
I am now plotting the US National Weather Service weather warning and
watch zones for the entire continental US on my 30M HF APRS map at:
This UI-Webserver is running here at my house over a consumer "768K"
ADSL account whose uplink (outbound) speed is only about 150K. . Details
of the "Ham Superserver" that runs the UIview server and several other
ham Internet apps is here:
If too many people hit this server at the same time, you may get
timeouts or partial loads of the map. If this happens try again.
***** HOW THIS WORKS *****
The UI-NWS add-in for UI-View can automatically plot the U.S. warning
and watch zones on UIview maps, if you have an always-on Internet
connection. These zone outlines are turned on and off by a stream of
messages, passed over the APRS Internet system. The messages come from
a special server that receives US government NWS bulletins and reformats
them into APRS-compatible bulletins. These messages are inserted into
the APRS Internet system by a virtual igate called "WXSVR".
The NWS bulletins are received for the entire country, even on
regional-filtered APRS feeds. If you use the port 14580 user-defined
filter port on an APRS server, adding "t/n" to the normal port 14580
filter expression will cause all of the NWS bulletins to be sent, along
with weather-related APRS area objects originated by APRS users.
UI-NWS snags these special messages and uses them to light up the
display of colored translucent area outlines contained in a set of
"shape files" available from the US NOAA (National Oceanic & Atmospheric
Details on downloading and using the shape files for use with UIview and
other APRS programs is on my website at:
Details for using shape files with UIview are in the help system within
UI-NWS. Start this plugin by pulling down "File, UI-NWS" from the main
UIview 2.03 program.
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