The watershed of Lake Ontario, rendered as an urban transit network. One more in my ongoing atlas project.
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somethingaboutmaps 
Oh and look, the Cataraqui River that empties into Lake Ontario at Kingston – other end of the Rideau Canal system – is also missing.
For these maps, I chose to exclude canal systems entirely and deal with natural watercourses. I’m not sure why you’re approaching me with what feels like a tone of derision. Did I do something to offend you?