Detailed map of Texas, the Rocky Mountains, Southwest and Mexico, centered on the Rocky Mountains and extending north to the Cheyenne area and the Great Salt Lake. Includes both Salt Lake and the mytical lake to its south, with what amounts to a continuation of the Rio de San Buenaventura extending eastward. The conjectural sources of the Colorado River are shown extending to the Rocky Mountains, ignoring the Wasatch and several other intervening mountain ranges. East of the Rocky Mountains, the geography on either side of the Rio Grande is well known, but there is no sign of the results of Long's expedition to the Rocky Mountains. Good detail along the Gila and in Texas. Dozens of Indian Tribes and place names are shown. One of the few regional maps focusing on Texas and the Rocky Mountains during the period.
Ambroise Tardieu was an important French cartographer and engraver.
He produced a number of excellent large format maps, including a revised edition of Aaron Arrowsmith's 4-sheet map of the United States. T
Tardieu came from a family boasting a number of fine engravers, and was trained from an early age by his uncle, Pierre Alexandre Tardieu (1756–1844), a leading French engraver. Showing considerable talent in this field, Ambroise persevered and became a celebrated engraver of portraits. In addition he was appointed as geographical engraver for the French government, for which he received a small stipend. In order to eke out this meagre wage, he began to trade in prints, books and maps. He is remembered for more than 800 portraits engraved through his career, many depicting scientists of the period.
Tardieu published a number of atlases, one of which appeared in 1842 and was titled Atlas universel de geographie, ancienne et moderne/dresse par Ambroise Tardieu pour l'intelligence de la Geographie universelle par Malte-Brun.