1997. This polygon shapefile contains ice observations in the Arctic region for February 24, 1997. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
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1996. This polygon shapefile contains ice observations in the Arctic region for February 5, 1996. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1996. This polygon shapefile contains ice observations in the Arctic region for February 26, 1996. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1996. This polygon shapefile contains ice observations in the Arctic region for March 11, 1996. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1704. Nolin, Jean Baptiste, 1648-1708. 1 map: color; Relief shown pictorially; Watermark; Includes text. Scale approximately 1:14,250,000 (W 125°45ʹ00ʺ--W 37°51ʹ00ʺ/N 60°51ʹ00ʺ--N 4°44ʹ0... Chez J.B. Nolin.
Petroff, Ivan, 1842-, United States, Department of the Interior., and United States, Bureau of the Census. compiled by Ivan Petroof [sic] ; drawn by Harry King ; Dept. of the Interior. Relief shown by hachures and land forms. "Map II. Tenth census of The... The Dept. and Julius Bien & Co.
1996. This polygon shapefile contains ice observations in the Arctic region for January 22, 1996. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1996. This polygon shapefile contains ice observations in the Arctic region for March 4, 1996. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for February 10, 1997. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
2011. United States. Bureau of Transportation Statistics and United States. Federal Highway Administration. This polyline shapefile depicts the National Highway Planning Network, a comprehensive network database of the United States' major highway system.... United States. Bureau of Transportation Statistics.