1997. National Imagery and Mapping Agency. World Grassland Areas is a polygon theme representing grasslands throughout the world. Features in this layer have an FACC (Feature and Attribute ... National Imagery and Mapping Agency.
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1997. National Imagery and Mapping Agency. World Swampland Areas is a polygon theme representing marshes, swamps and bogs worldwide. Features in this layer have an FACC (Feature and Attribu... National Imagery and Mapping Agency.
1997. National Imagery and Mapping Agency. World Trees Areas is a polygon theme representing forested areas world wide. Features in this layer have an FACC (Feature and Attribute Coding Cat... National Imagery and Mapping Agency.