1991. This polygon shapefile contains ice observations in the Arctic region for February 25, 1991. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
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United States, Office of Strategic Services., Research and Analysis Branch. and United States, Board of Economic Warfare. Board of Economic Warfare, Office of Imports ; drawn in R and A, OSS. "Confidential." "Map No. 879.". Reproduced in OSS.
United States, Office of Strategic Services., Research and Analysis Branch. and United States, Board of Economic Warfare. Board of Economic Warfare, Office of Imports ; drawn in R and A, OSS. "Confidential." "Map No. 1310.". Reproduced in OSS.
United States, Office of Strategic Services., Research and Analysis Branch. and United States, Board of Economic Warfare. Board of Economic Warfare, Office of Imports ; drawn in R and A, OSS. "Confidential." "Map No. 1391.". Reproduced in OSS.
1995. This polygon shapefile contains ice observations in the Arctic region for April 3, 1995. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
2008. World Wildlife Fund (WWF). This raster layer is a void-filled digital elevation model (DEM) of Europe at 15 arc-seconds resolution. Elevation is expressed in meters and refer... U.S. Geological Survey.
2008. World Wildlife Fund (WWF). HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales) provides hydrographic information in a consistent... U.S. Geological Survey.
1783. L'Isle, Guillaume de, 1675-1726. Relief shown pictorially.; Hand colored. 47.5 x 62.2 centimeters Scale approximately 1:10,000,000 General Map Collection. chez Dezauche successeur des Srs. Del'Isle et Buache Rue des Noyers prés celle des Anglois (A Paris).
2001. This polygon shapefile contains ice observations in the Arctic region for August 13, 2001. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
2001. This polygon shapefile contains ice observations in the Arctic region for August 14, 2001. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).