Regions around Cities
Download the Scalable Vector Graphic of the Regions around Cities.
About SVGZ Graphic: Regions around Cities ....
Using Voroni polygons around major cities, actually does a pretty good job at predicting regions, especially if you pick good control cities.
I used the Natural Earth control cities, but I could see swapping a few of these out -- like eliminating Schenectady as it's so linked to Albany and adding Oneonta.
I did have to hack off the North Fork of Long Island and manually stick it in New York due to getting captured in the Poughkeepsie polygon but that's an artifact of how Voroni works without knowledge of connections. A better algorithm for dealing with water breaks would be something that uses a connectivity map to generate the regions.
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More about New York State...
New York is a state in the Northeastern region of the United States. New York is the 27th-most extensive, the 3rd-most populous, and the 7th-most densely populated of the 50 United States. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east. The state has a maritime border with Rhode Island east of Long Island, as well as an international border with the Canadian provinces of Ontario to the west and north, and Quebec to the north. The state of New York is often referred to as New York State to distinguish it from New York City.
