The following images are scanned sections of the joint USGS/US Customs Service series produced in 1979. Photoimagery rectified by optical scanning from color infrared photography taken by the Direccion General de Geographia del Territorio Nacional, Mexico D.F., Mexico. Scale is 1:25,000. Photos scanned on HP Scanjet 4c, edited in Corel Draw and Corel Photo Paint.
This is work done and/or assembled by M. Waggoner.
