Mapping the Border
Below are 3 different methods of mapping the border region, each defining a different spatial boundary.
1. The US / Mexico Border According to Transportation Networks
2. The Hydroregionalization of the US / Mexico Border
3. The US / Mexico Border According to Political Boundaries
The US / Mexico Border According to Transportation Networks. Sources: Barton-Aschman & La Empresa, 1997 http://www.borderplanning.fhwa.dot.gov/maps/airports.jpg / http://www.borderplanning.fhwa.dot.gov/maps/railroads.jpg and http://ai.fmcsa.dot.gov/International/images/mexusmap.jpg
Hydroregionalization of the US / Mexico Border. Source: Department of the Interior http://www.cerc.usgs.gov/fcc/pubs/Fact_sheets/DOI_US-MX_Border_FCC_Fact_sheet_1.pdf
The US / Mexico Border According to Political Boundaries. Sources: http://upload.wikimedia.org/wikipedia/commons/9/97/Mexico-US_border_counties.png and Hyperborder http://www.amazon.com/Hyperborder-Contemporary-Mexico-Border-Future/dp/1568987064
