New answers tagged administrative-boundaries
Tom Tom, Nokia, https://www.gfk.com/solutions/geo-marketing/Digital-maps/Pages/Digital-maps.aspx OSM is a good free option (make sure to comply with license)
This is what you need: http://en.wikipedia.org/wiki/Table_of_administrative_divisions_by_country Admin 4 is a Administrative 4 Level Boundary. United States is structured as follows: Admin 0 - Nation, Admin 1 States along with Federal District (DC), Admin 2 - Counties & Independent Cities, etc Sometimes these are straight forward, but sometimes ...
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