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1990. California. Metropolitan Transportation Commission. This line shapefile contains primary and secondary roads for the San Francosco Bay Area in California. Primary roads are generally divided, limited... California. Metropolitan Transportation Commission.
1937. Home Owners Loan Corporation. This layer is a georeferenced image of a 1937 Thomas Bros. street map of San Francisco (which also shows streetcar and trolley bus lines at the tim... Stanford University. Center for Spatial and Textual Analysis.