This UNOFFICIAL United States-Mexico boundary dataset was developed by the U.S. Geological Survey’s Border Environmental Health Initiative (BEHI) (http://borderhealth.cr.usgs.gov/index.html), to be used as a common boundary for the clipping and geometric integration of binational geospatial datasets. It provides a single boundary that has been used throughout the project, but is not representative of any officially recognized international boundary. International borders politically divide the landscape but rarely represent barriers for environmental issues. The major issues surrounding the U.S.-Mexico border involve economics and population growth that present challenges to environmental management and natural...