I have a project that would benefit greatly from an area map of San Francisco. The dates of the project range from 1911-1913 so I would like to find as large-resolution map as possible of the peninsula at that time. Free maps are preferred, but paid maps would be worth it if the quality is there. Is there a reliable source around for such a map?
(I would imagine many maps were created surrounding the 1906 earthquake and fire. While slightly earlier than the timeframe I am looking at, they would suffice provided I can get them without fire overlays.)