Nice example of Mathew Carey's map of the Seven Ranges, published in Carey's American Atlas and General Atlas in 1814.
This map was engraved by William Barker and is based upon Thomas Hutchins Survey of 1785. Hutchins, who was the first (and only) Geographer of the United States, surveyed the lands into ranges and townships that would become the standard system in the US and elsewhere.
The first effort to survey the lands shown began in 1785, but was abandoned due to Indian hostilities and was resumed when joined by a military escort in 1786. Hutchins personally oversaw the survey of the first four ranges. On the map, the lands of the Ohio Company are noted along with other points of considerable historical importance.
An essential map for Ohio collectors and of tremendous importance in the history of American cartography.
Carey's American Atlas was the first atlas published in the United States, compiling a number of excellent maps from indigenous sources in the first compilation of American maps.