1877 US Coast Survey Map Wisconsin Triangulation Reconnaissance Madison Janesvil For Sale

1877 US Coast Survey Map Wisconsin Triangulation Reconnaissance Madison JanesvilleAn authentic, original 1877 antique triangulation and reconnaissance survey map of the State of Wisconsin. This historic map details the early geodetic survey lines laid down across southern and western Wisconsin during the late 19th century.It charts the intricate geometric webs tracking key geographic hubs, including Madison, Janesville, Monroe, the Wisconsin River, and the upper Mississippi River border near Iowa and Minnesota. A wonderful historical artifact for map collectors specializing in Wisconsin state history, Midwestern cartography, or early civil engineering and surveying techniques.
It measures 11\" by 12.75\".