1882 USC&GS San Francisco Bay Entrance sheet

unusual micro-printed 1882 document showing the topography of San Francisco and Depths of the Bay, very difficult data to get together on one map and early . Streetscapes and roadways indicated through iconography shows early Sf transit lines into the western dunes and urban growth to date. Lack of city grid indicates lack of city, but instead sand in most cases. Waterway depths from the USCS and expanded upon following the demolition of Blossom rock. size 18 x 23" fine condition.