1881 Triangulation Coast of Maine is a beautiful example of the mountain top and bench mark lines surveyed by the US Coast Survey to establish an overall grid mapping the entire coast and coastal river systems of the United States. This idea was born of the same Jeffersonian inclination for gathering scientific data as the Lewis and Clark Corps of Discovery Expedition. The legislation that created the US Coast Survey passed in 1807. It is from the triangulation surveys that all subsequent surveys of the coast get a starting point for the more detailed maps, many of which are in the Galeyrie Maps & Charts collection.
Archival reproduction print from high resolution scan. 24" x 35.5"