
Calexico and Heber anchor this detailed study of the Imperial Valley agricultural landscape, situated immediately north of the United States - Mexico border. The terrain is defined by a sophisticated irrigation network necessary for desert farming, featuring an intricate grid of waterways including the All-American Canal, the Central Main Canal, and the Birch Canal. These man-made features contrast with the natural winding course of the New River as it cuts through the geometric blocks of fields and laterals.
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This is the sole edition of this map. No revisions or reprints were ever made.
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