Nice example of John Melish's map of the United States.
The map extends westward to depict the northwest, Missouri and "Arkansaw" territories, and the province of Mexico, including Texas. The map draws extensively from Lewis & Clark, Pike, Humboldt and others. The genesis of this map begins in 1812, with its issuance in pocket map format by Melish. The map was improved, reissued and slightly expanded for a number of works over the next 15 years.
John Melish was perhaps the single most important map maker of the 1810s and 1820s. His large format map of the US, first published in 1816, is perhaps the single most important American map of the 19th Century and is generally referred to as the visual embodiment of manifest destiny.