1990. This polygon shapefile contains ice observations in the Arctic region for June 11, 1990. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
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1997. This polygon shapefile contains ice observations in the Arctic region for October 23, 1997. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1994 and 1995. National Geophysical and Solar-Terrestrial Data Center. This map shows the four types of light sources as observed in North America during 1994-1995. The Defense Meteorological Satellite Program (DMSP) O... National Geophysical and Solar-Terrestrial Data Center.
2000. This polygon shapefile contains ice observations in the Arctic region for May 16, 2000. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
2000. This polygon shapefile contains ice observations in the Arctic region for May 17, 2000. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
3066. Africa (Raster Image)
1818. Stanford Geospatial Center and Pinkerton, John, 1758-1826. This layer is a georeferenced raster image of an historic continental map of Africa originally created by John Pinkerton in 1818. All map collar an... Stanford Digital Repository.
1997. This polygon shapefile contains ice observations in the Arctic region for August 1, 1997. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for August 11, 1997. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for August 13, 1997. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for August 4, 1997. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).