[aprssig] "The New" WXSVR and Canada

[Stephen H. Smith]

Brad [VE3BSM] wrote:
>
>
>  
>
> 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).
>
>  
>

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.


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.


------------------------------------------------------------------------

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Stephen H. Smith    wa8lmf (at) aol.com
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