Digital Sanborn Maps for California (1867-1970) This link opens in a new window
Digitized large-scale fire insurance maps. have the ability to easily manipulate the maps.
Includes the outline of each building, the size, shape and construction materials, heights, and function of structures, location of windows and doors. The maps also give street names, street and sidewalk widths, property boundaries, building use, and house and block numbers. Seven or eight different editions represent some areas. Can magnify and zoom in on specific sections.