1997. National Imagery and Mapping Agency. World Sand Areas is a polygon theme representing desertified regions world wide. Features in this layer have FACC (Feature and Attribute Coding Ca... National Imagery and Mapping Agency.
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1997. National Imagery and Mapping Agency. World Sea Ice is a polygon theme representing areas of sea or pack ice throughout the world. Features in this layer have an FACC (Feature and Attr... National Imagery and Mapping Agency.
1997. National Imagery and Mapping Agency. World Tundra Areas is a polygon theme representing areas of Tundra landcover worldwide. Features in this layer have an FACC (Feature and Attribute... National Imagery and Mapping Agency.