A philosopher, architect, astronomer, and polymath, Thomas Jefferson lived at a time when geography was considered the -mother of all sciences.- Although he published only a single printed map, Jefferson was also regarded as a geographer, owing to his interest in and use of geographic and cartographic materials during his many careers--attorney, farmer, sometime surveyor, and regional and national politician--and in his twilight years at Monticello. For roughly twenty-five years he was involved in almost all elements of the urban planning of Washington, D.C., and his surveying skills were...