2018 Map of Vopoki Ridge SE

About this map

The international border defined by the United States of America Estados Unidos Mexicanos boundary line cuts diagonally across this desert landscape, separating Arizona's Yuma County from Sonora, Mexico. This 2018 survey illustrates a stark, open terrain characterized by ephemeral drainage patterns and subtle elevation changes across the borderlands. The map is primarily organized around the Public Land Survey System grid, including T12s R21w, T12s R20w, and T12s R19w. Because the area lacks named settlements or developed infrastructure, the focus remains on the precise demarcation of the international frontier and the natural alluvial features that define the region's geography. Researchers interested in border history and the logistical layout of the southwestern desert will find the coordinate systems and township markers essential for orienting this specific stretch of the United States-Mexico line.