Referenced by Selection: Engineers Corps, Map of Southwestern Territory, 1877 Your Browser doesn't support iframes. Geographic Area Covered: Arizona, California, Nevada, Utah, Southwestern States, Southwest, New, Mexico--Sonora (State) Geographic Coordinates: (W 117°50ʹ--W 108°15ʹ/37°20ʹ--N 27°25ʹ) View on Google Maps