Sketch A Showing the Primary Triangulation in Section I Massachusetts anchorages

anchorages

Chamberlin Trimetric Projection

A very nice detailed chart of Gloucester Harbor

Chart of Portsmouth Harbor

Sketch A Showing the Primary Triangulation in Section I Massachusetts anchoragesA nice chart of the Northeast Coast of The United States showing the triangulation of the Survey. This is an overview chart of the area showing fine coastline detail and the states and the various triangulation stations. 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,