2007. World Wildlife Fund (WWF). HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales)flow accumulation maps define amount of upstream a... U.S. Geological Survey.
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1990. This polygon shapefile contains ice observations in the Arctic region for February 12, 1990. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
2973. Africa
A. Bell sculpt. Relief shown pictorially. Latitudinal and longitudinal lines. Prime meridian: London. Coordinates approximate and based on Greenwic... publisher not identified,.
1997. This polygon shapefile contains ice observations in the Arctic region for September 10, 1997. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for September 11, 1997. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for September 12, 1997. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for September 15, 1997. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for September 16, 1997. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for September 17, 1997. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
2000. This polygon shapefile contains ice observations in the Arctic region for July 18, 2000. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).