
The Rio Grande forms the southern boundary of this borderlands survey, defining the international line between the United States and Mexico. The landscape is dominated by the sophisticated water management systems of the Lower Rio Grande Valley, including the North Floodway, Main Floodway, and several large basins like the Mercedes Settling Basin. These structures reflect the region's historical transformation into a productive agricultural corridor.
74 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1914 · San Juan
USGS Topo · 1:48,000
1916 · San Juan
USGS Topo · 1:62,500
1929 · Santa Maria
USGS Topo · 1:24,000
1929 · La Feria
USGS Topo · 1:24,000
1936 · La Feria
USGS Topo · 1:31,680
1936 · Santa Maria
USGS Topo · 1:31,680
1949 · Mc Allen
USGS Topo · 1:250,000
1953 · Brownsville
USGS Topo · 1:250,000
1954 · McAllen
USGS Topo · 1:250,000
1956 · La Feria
USGS Topo · 1:24,000