Geography professor Dr. Andrew Shears has published a map of the regions of the United States, according to his own mental map of the country. He divides the country into an impressive fifteen regions, including smaller regions of SoCal, Florida, the Gulf Coast, and Old Industry. Dr. Shears' post led me to another map of U.S. regions by geography graduate student Emily Fekete. She divides the United States into ten regions and also discusses her regions, which tend to be larger on average. These regionalizations are reminiscent of Joel Garreau's Nine Nations of North America. How would you divide North America?
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I believe someone has created a map delineating the country’s regions based on watersheds which makes a great deal of sense to mr. Would like to see the map actually.
Yes, the U.S. Geological Survey (USGS) has a dataset called the National Hydrography Dataset (NHD). You can learn how to access it at
http://nhd.usgs.gov/NHD_Quickstart_Feb_09.pdf
It will send you on to the actual dataset after that. The data are not exactly easy to access, but it is the most extensive dataset of the country using watersheds that I know of.