Since Canada is barely included and Alaska missing, this map should be called half-of-North-America.
So little of Canada is included I actually didn't even mention it in the description! The map goes up to 50 degrees north, so Southern Ontario and Quebec, along with Nova Scotia are the main areas of Canada included. I've nothing against Canada (or Alaska), it was purely a practical decision not to include it as correcting for distortion above 50 degrees north was going to become increasingly difficult. Also I've deliberately edited out Newfoundland (along with Haiti and the Dominican Republic) as these islands would be half off the map in any case.
If it was a totally hand-made map, I might expect the bays I know to be better represented - but for a tweaked map, it's quite good.
On the Gulf Coast I checked the areas around Houston, New Orleans and the Florida Keys (along with parts of the Mexican coast) with Google Maps to ensure a reasonable accuracy. For other areas I did a quick check to make sure there wasn't any huge errors, but the large number of lagoons and barrier islands mean that it's quite difficult to represent everything. If you want to give suggestions for areas you are familiar with that would be very welcome!
I'd be very impressed if someone could create a detailed hand made map of North America at this size, it would require a fair bit of patience I think!
Incidentally other areas I did quite a bit of tweaking with were Nova Scotia, the New England Coast, New York, Philadelphia, the Delaware River and San Francisco.
To use the Great Lakes properly will require water height editing, I've not tried this yet but that will mean more fun and games working out the coastline there!