Texas Digital Sanborn Maps, 1867-1970
Provides digital access to large-scale maps of 426 cities in 213 counties in Texas. The map scale is 1:600 or 50 feet to 1 inch. Overall, the maps were prepared from 1877 to 1951. Some larger cities have updated maps as recent as 1970.
Created originally for the fire insurance industry for risk assessment purposes, Sanborn maps contain detailed information on such building features as size, shape, construction type (and sometimes date), use, and street address. The maps also give street names, street and sidewalk widths, property boundaries, building use, and house and block numbers.