This is an excellent map of the US.  Insets are Gold Region of California and the District of Columbia.  Large New Mexico, Utah, Oregon, Washington, Nebraska, Minnesota and Kansas Territories are shown.  This map is indicative of the rush to create a transcontinental railroad, including proposed northern, central and southern routes shown and a notation about the transcontinental railroad, which was completed 13 years after this map.  Roads, routes and wagon trails are shown, including Santa Fe Route and the Great Spanish Trail. Much detail is offered as to topography, rivers, lakes, settlements, indian tribes, battlefields, canals, railroads, including ones under construction, etc.