April 19, 2006

This report contains information describing geospatial data 
for the twin city area of Ambos Nogales, located along the 
Arizona-Sonora portion of the US-Mexico border.  Shapefiles 
and accompanying metadata are available in the folder 
contained in the "of2006-1112_shapefiles.zip" file for the 
following datasets:


1975 Urban Extent of Ambos Nogales
1983 Urban Extent of Ambos Nogales
1995 Urban Extent of Ambos Nogales
2002 Urban Extent of Ambos Nogales
Waterlines for Nogales, Arizona
Waterlines in Nogales, Sonora
Sewerlines of Nogales, Arizona
Sewerlines for Nogales, Sonora
Colonias of Nogales, Arizona
Homogeneous Areas of Nogales, Sonora


CITATION: 

Norman, Laura M., Donelson, Angela, Pfeifer, Edwin, and 
     Lam, Alven H., 2006, Colonia development and land use 
     change in Ambos Nogales, United States-Mexican border:  
     U.S. Geological Survey Open-File Report 2006-1112 
     [available on the World Wide Web at URL 
     http://pubs.usgs.gov/of/2006/1112/ ].

CONTACT:

Laura M. Norman, Ph.D.
U.S. Geological Survey, Southwest Geographic Science Center
520 N. Park Avenue, Suite #355, Tucson, AZ 85719-5035
Phone: (520) 670-5510, Fax: (520) 670-5571