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Brad [VE3BSM] wrote:
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<p class="MsoNormal"><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";">Previously,
Dale's server provided warnings (but not shapes) for some or all of
Canada. I
know because I was gating warnings for Ontario (WTOSVR) out to RF. I
recall
Dale & I exchanging e-mail on his work to being able to send out
the
Canadian warnings (and the near-impossibility of doing shapefiles for
Canada
thanks to the Canadian government).<o:p></o:p></span></p>
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<br>
Why should that be "near-impossble"? The shapes are just
vector-drawing outlines, similar to what Adobe
Illustrator, AutoCad or Corel Draw create, tagged with absolute
lat/long
coordinates rather than inches or cm from some arbitrary origin point.<br>
<br>
<br>
Even if these shapes are not available for effortless download from
some government agency, it should be possible to load a scanned image
of a paper map (or bitmap image from a website) into a vector-oriented
program like Corel Draw, Adobe Illustrator, MapInfo or ArcView as the
bottom layer. Then trace the boundaries of whatever warning zones or
areas Environment Canada uses for weather alerts, using the program's
vector draw tools. You then save the outline objects on the vector
layers into individual files and convert them to ESRI ArcView format. <br>
<br>
<br>
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--<br>
<br>
Stephen H. Smith wa8lmf (at) aol.com <br>
EchoLink Node: WA8LMF or 14400 [Think bottom of the 2M band]<br>
Skype: WA8LMF<br>
Home Page: <a class="moz-txt-link-freetext" href="http://wa8lmf.net">http://wa8lmf.net</a><br>
<br>
JavAPRS Filter Port 14580 Guide <br>
<a class="moz-txt-link-freetext" href="http://wa8lmf.net/aprs/JAVaprsFilters.htm">http://wa8lmf.net/aprs/JAVaprsFilters.htm</a><br>
<br>
"APRS 101" Explanation of APRS Path Selection & Digipeating <br>
<a class="moz-txt-link-freetext" href="http://wa8lmf.net/DigiPaths">http://wa8lmf.net/DigiPaths</a> <br>
<br>
Updated "Rev H" APRS <a class="moz-txt-link-freetext" href="http://wa8lmf.net/aprs">http://wa8lmf.net/aprs</a><br>
Symbols Set for UI-View, <br>
UIpoint and APRSplus:<br>
<br>
<br>
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