While I work and struggle on my NYC challenge map, I wanted to start something else so that when I get frustrated on the challenge map, I can go and get frustrated on this map.
This is going to be a post-apocalyptic Canada, after a massive climatic upheaval (the whole planet is much, MUCH warmer; there's no polar ice any longer, but the Earth is also a bit closer to the sun now, so that extra water has somewhat evaporated). ...Which is my non-scientific and easy-way-out to explain mostly familiar coastlines.