
United States of America Estados Unidos Mexicanos defines the northern edge of this international borderland in southern Arizona. The landscape is characterized by the wide, arid expanse of The Great Plain, where ephemeral drainage patterns weave across the desert floor. This 2021 survey illustrates a sparse, unpopulated terrain south of Bailey Peak, documenting the precise location of the international boundary line and the network of dry washes that define the local hydrography in Pima County. It serves as a modern record of the natural topography along the edge of the Sonoran region before it transitions into Mexico.
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This is the sole edition of this map. No revisions or reprints were ever made.
1954 · Sonoyta
USGS Topo · 1:250,000
1963 · Kom Vo
USGS Topo · 1:62,500
1963 · Lukeville
USGS Topo · 1:250,000
1963 · Diaz Peak
USGS Topo · 1:62,500
1988 · South of Bailey Peak
USGS Topo · 1:24,000
1988 · South of Papago Farms
USGS Topo · 1:24,000
1988 · Bailey Peak
USGS Topo · 1:24,000
1988 · Papago Farms
USGS Topo · 1:24,000
1988 · Menagers Lake
USGS Topo · 1:24,000
1994 · Lukeville
USGS Topo · 1:100,000