The man who created it is John Mitchell who was a physician and a botanist before being asked to consolidate various smaller regional and state maps, ship journals, etc into one comprehensive larger map.
It was apparently, according to this video, a factor in starting the French and Indian War due to its depiction of French forts in British territory.
It even helped to start the Toledo War over the Ohio-Michigan border in 1835 by showing the southern end of Lake Michigan too far north — and those folks still hate each other.
Technically it’s a map that belongs in British history because it was commissioned by the Earl of Halifax and America was still just a set of British, French, and Spanish colonies.