Granite Mountains rise in the northeastern corner of this Riverside County landscape, providing a sharp topographical contrast to the expansive desert floor that dominates the rest of the sheet. The area is defined by its vast alluvial slopes and a grid of township and range lines, including t2s r17e and t3s r17e. Human presence is sparse, marked primarily by the lonely transit of Coxcomb Monument Rd, which cuts horizontally across the lower sections of the map. This 2018 survey captures the region's character as a largely undeveloped corridor within the California desert, where natural drainage patterns and elevation contours are the primary features of interest for those studying the physical geography or land management history of the interior basin.
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This is the sole edition of this map. No revisions or reprints were ever made.
1942 · Amboy
USGS Topo · 1:250,000
1943 · Amboy
USGS Topo · 1:250,000
1943 · Cadiz Valley
USGS Topo · 1:62,500
1943 · Iron Mountains
USGS Topo · 1:62,500
1943 · Coxcomb Mountains
USGS Topo · 1:62,500
1944 · Coxcomb Mountains
USGS Topo · 1:62,500
1952 · Palen Mountains
USGS Topo · 1:62,500
1954 · Salton Sea
USGS Topo · 1:250,000
1954 · Needles
USGS Topo · 1:250,000
1955 · Salton Sea
USGS Topo · 1:250,000