Unusual map of the United States with significant manuscript additions.
The map does not show Ohio (Ohio became a state in 1801). Mississippi Territory is shown below Georgia. Mississippi Territory was established in April 1798 (with West Florida below it and Georgia above and to the east) and remained in this configuration until the Georgia cession of 1804.
As such, the shape of Mississippi Territory suggests a date for this map between 1798 and 1801.