A nice hand colored example of the 1st edition of the US Coast Survey's First mapping of San Diego.
This first edition can be distinguished from the 2nd edition by the addition of the official seal of the US Coast Survey in the left of the map on the 2nd edition.
The plan of the harbor covers the area from Point Loma and La Playa in the west to Shelter Island, with extensive soundings taken. Point Loma, Balast Point, La Playa, an Observatory, ship wreck and various buoys are noted. Larger inset diagram shows the entire bay. Extensive sailing notes in the upper left corner. One of the earliest obtainable maps of San Diego.