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great map, I have a few questions. I’m curious as to why you chose [Philadelphia (PA)](http://en.wikipedia.org/wiki/Philadelphia_County), [Camden (NJ)](http://en.wikipedia.org/wiki/Camden_County,_New_Jersey), [Gloucester (NJ)](http://en.wikipedia.org/wiki/Gloucester_County,_New_Jersey), [Delware (PA)](http://en.wikipedia.org/wiki/Delaware_County,_Pennsylvania) to be “coastal” counties but not [Burlington (NJ)] (http://en.wikipedia.org/wiki/Burlington_County) or [Bucks (PA)](http://en.wikipedia.org/wiki/Bucks_County,_Pennsylvania)?
All of these counties share the Delaware river. I can see why you included the Delware bay counties (Cumberland, Salem (NJ) and pretty much all of DE) to be coastal, but I’m curious as to why you separated the Deleware river like that.