1967 Map of Ayr

Water management and natural drainage are evident along the meandering course of Swan Creek, which winds through the southern portion of the quadrangle. For those researching the local landscape, the map provides precise locations for small-scale industry and community landmarks, including several Gravel Pit operations and the Erie Cem. Fine dashed lines throughout the fields indicate fence and field boundaries visible during the 1965 photogrammetric survey, offering a rare look at the mid-century spatial organization of North Dakota farmland.