A Topographical Chart of the Bay of Naraganasett in the Province of New England, with all the isles contained therein, among which Rhode Island and Cononicut have been particularly surveyed is the definitive Revolutionary era map of Rhode Island. It was published in 1777 in William Faden's North American Atlas.

Anticipating the War, the map shows "the true positions and bearings of the Banks, Shoals, Rocks, etc. as Likewise the Soundings: To which have been added the several Works & Batteries raised by the Americans". The map was "Taken by Order of the Principal Farmers on Rhode Island", all 32 of whom are named.

Just west of Providence, Blaskowitz notes, "in this part of the Country there is a Furnace and an Iron Foundry where they cast cannons". Just below the city he indicates the location of a fortification "commanding the Navigation up to Providence and Calculated for a Shelter for men with small arms but without cannon".

The map's comprehensive detail is extraordinary: individual farm fields are outlined and trees in orchards are shown.

About Charles Blaskowitz

Charles Blaskowitz was a British military surveyor assigned by Samuel Holland to chart the Rhode Island coastline and the harbor at Newport in particular as a part of Holland's survey of the entire New England coast.