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1. 1:1,000,000-Scale County Boundary Lines of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile contains the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. This layer was derived from t... Geological Survey (U.S.).

2. Global Map: 1:1,000,000-Scale Political Boundary Lines of the United States, 2014

2014. National Atlas of the United States. This line shapefile includes Global Map data showing the counties and equivalent entities of the United States, Puerto Rico, and the U.S. Virgin Is... National Atlas of the United States.

3. Offshore Border: United States and Mexico, 2004

2004. California. Department of Fish and Game. Marine Resources Region. This line shapefile represents the offshore boundary between the United States and Mexico. This layer is part of a collection of data created by th... California. Department of Fish and Game. Marine Resources Region.

4. Political Boundary Lines, North America, 2004

2004. Instituto Nacional de Estadística, Geografía e Informática (Mexico), Geological Survey (U.S.), and Canada Centre for Remote Sensing. This line shapefile depicts the political boundaries of North America, including: international boundaries, provincial boundaries, state or territo... Geological Survey (U.S.).

5. State and Province Boundaries, 1:50 million (2012)

2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polyline shape file depicts internal, first-order administrative boundaries and polygons for states and provinces of Australia, Brazil, Canada... North American Cartographic Information Society.

6. United States County Boundaries, 2010-2011

2010. TomTom North America, Inc. and Environmental Systems Research Institute (Redlands, Calif.). This line shapefile represents the county boundary lines of the United States at 1:100,000 scale.This layer is part of the 2014 ESRI Data and Maps ... Environmental Systems Research Institute (Redlands, Calif.).

7. U.S. Parks and Protected Land Lines, 1:10 million (2012)

2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polyline shapefile depicts 394 authorized Park Service units in the United States only that are over 100,000 acres. The data does not include ... North American Cartographic Information Society.

8. U.S. State Boundaries, 2010-2011

2010. TomTom North America, Inc. and Environmental Systems Research Institute (Redlands, Calif.). This line shapefile represents the boundary lines of the states of the United States at 1:100,000 scale. This layer is part of the 2014 ESRI Data a... Environmental Systems Research Institute (Redlands, Calif.).

9. U.S. State Boundary Lines, 1:110 million (2012)

2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polyline shape file depicts internal, first-order administrative boundaries and polygons for states of the United States. All countries havin... North American Cartographic Information Society.