Geological Map, Point Reyes and Vicinity Atlas Triangulation chart showing the progress

Triangulation chart showing the progress of the survey from Monterey Bay to the Bay of San Francsico and San Pablo Bay

The map is mounted to archival backing

A nice preliminary chart of the lower section of the Chesapeake Bay

and historical places and events

and east to Lake Washington's western shore

Geological Map, Point Reyes and Vicinity Atlas Triangulation chart showing the progressA simple Geological Map, Point Reyes and Vicinity, California done for the reports of the Coast Survey. IMPORTANT NOTE: All of our United States Coast Survey (USCS), United States Coast & Geodetic Survey (USC&GS), and similar maps and charts have been professionally unfolded and flattened using humidity baths, semi permeable membrane, and drying blotter techniques. Most others you typically see on eBay have not been, and worse, are quickly and crudely