
Santa Monica sits at the heart of this agricultural landscape in the Rio Grande Valley, where the boundary between Willacy Co and Cameron Co bisects fields and ranchlands. The area is defined by its complex water management systems, including the wide North Floodway and the winding course of the Arroyo Colorado. These waterways, alongside features like the Bilot Channel and San Vicente Drainage Ditch, illustrate the engineering required to sustain cultivation in this coastal plain environment.
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This is the sole edition of this map. No revisions or reprints were ever made.
1929 · Rio Hondo
USGS Topo · 1:24,000
1929 · Harlingen
USGS Topo · 1:24,000
1930 · La Leona
USGS Topo · 1:24,000
1930 · Laguna Atascosa
USGS Topo · 1:24,000
1932 · Combes
USGS Topo · 1:31,680
1932 · Rio Hondo
USGS Topo · 1:31,680
1932 · Harlingen
USGS Topo · 1:31,680
1933 · Paso Real
USGS Topo · 1:31,680
1936 · La Leona
USGS Topo · 1:31,680
1936 · Laguna Atascosa
USGS Topo · 1:31,680