2010. National Geophysical Data Center. This line shapefile shows lines of equal annual change (secular variation), in the total field intensity of the Earth's magnetic field, derived fro... National Atlas of the United States.
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2010. National Geophysical Data Center. This line shapefile shows lines of equal annual change (secular variation) in the vertical component of the total field intensity of the Earth's ma... National Atlas of the United States.
2010. National Geophysical Data Center. This shapefile contains isodynamic lines (lines of equal total intensity of the Earth's magnetic field), derived from the International Geomagnetic... National Atlas of the United States.
2010. National Geophysical Data Center. This line shapefile shows lines of equal vertical intensity of the Earth's magnetic field, derived from the International Geomagnetic Reference Fie... National Atlas of the United States.
1740. Harvard Map Collection, Harvard Library and Seutter, Matthaeus, 1678-1756. This layer is a georeferenced raster image of the historic paper map entitled: Magni Ducatus Finlandiae Russiae partim, partim Sueciae subjecti, si... Harvard Map Collection, Harvard Library.
47596. Magni Mogolis Imperium
1750. Coávens et Mortier and Wit, Frederik de. Cartographic Details: Scale approximately 1:6,500,000 (E 65°0'--E 97°0'/N 37°30'--N 15°0'). Relief shown pictorially. Prime meridian: Ferro. Bar sc... Ex officina I. Covens et C. Mortier; Amsterdam.
47597. Magni Mogolis Imperium
1694. Schenk, Peter, 1661-1711 and Valck, G. (Gerard), 1651 or 1652-1726. Cartographic Details: Scale approximately 1:8,000,000 ; (E 60°00'00"--E 100°00'00"/N 43°00'00"--N 16°00'00"). Relief shown pictorially. In upper ma... P. Schenk et G. Valk ; Amsterdam.
1640. Jansson, Jan, 1588-1664. Cartographic Details: Scale approximately 1:8,100,000. Date"1640" hand painted into title box. Relief shown pictorially. Scale in graph form (Milli... Ioannem Ianbonium; Amsterdam.
1953. This is one in a series of 455 mid 20th century fire insurance maps produced by the Fire Insurance Rating Organization of New Jersey. Municipal Fir...
1925. Sanborn Map Company. "March 1925." "2064." Includes location map, key, streets and specials index, and text. North oriented towards upper right. New York : Sanborn Map Company, 1925.