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1988. Geological Survey (U.S.). This layer is a digital raster graphic of the 30 x 60 Minute USGS topographic map of the Lowell, Massachusetts quadrangle, 1988. Scale 1:100,000. I... United States Geological Survey.
1816. Harvard Map Collection, Harvard College Library, Carrigain, Philip, 1772-1842., Barralet, John James, ca. 1747-1815., Harrison, William, ca. 1750-1803., and Gilman, John Taylor, 1753-1828, dedicatee. This layer is a georeferenced raster image of the historic paper map entitled: New Hampshire by recent survey : made under the supreme authority an... Harvard Map Collection, Harvard College Library.
1996. Federal Emergency Management Agency. Q3 flood data for Idaho, 1996. The Q3 Flood Data are derived from the Flood Insurance Rate Maps (FIRMs) published by the Federal Emergency Manageme... Federal Emergency Management Agency.
1857. Harvard Map Collection, Harvard College Library, Chace, J., Swasey & Rowell., Smith & Coffin., Sawyer, G. B., and Sawyer, G. E. This layer is a georeferenced raster image of the historic paper map entitled: Map of Rockingham Co., New Hampshire, by actual surveys by J. Chace,... Harvard Map Collection, Harvard College Library.
1857. Harvard Map Collection, Harvard College Library, Chace, J., Swasey & Rowell., Smith & Coffin., Sawyer, G. B., and Sawyer, G. E. This layer is a georeferenced raster image of the historic paper map entitled: Map of Rockingham Co., New Hampshire, by actual surveys by J. Chace,... Harvard Map Collection, Harvard College Library.