Extensively detailed topographic map of an eastern portion of San Francisco Bay, including San Leandro, Hayward, and Fremont. The map contains excellent topographic detail, including bay tidal flats, reeks and rivers, coastal coves, and mountain ridges.
The map also features an array of important historical information, from railroads and landmarks (e.g. salt works), to early city grids.
This map is part of the USGS’s 15 Minute Quadrangle series, produced from the 1890s to the 1950s in order to provide a detailed topographic map coverage of the entire United States at the same scale.