This is a post road shapefile/geojson from Abraham Bradley's 1825 "Map of the United States : intended chiefly to exhibit the Post Roads & distances." http://www.loc.gov/item/98685522/
This is a post road shapefile/geojson from Abraham Bradley's 1825 "Map of the United States : intended chiefly to exhibit the Post Roads & distances." http://www.loc.gov/item/98685522/