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Drainage
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Hydrography
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Rivers
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Stanford
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Africa
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1. Africa: Drainage Directions, 15s resolution, 2007
2007. World Wildlife Fund (WWF). This drainage direction map for Africa defines the direction of flow from each cell in the conditioned digital elevation model to its steepest down... U.S. Geological Survey.
2. Africa: Drainage Directions, 30s resolution, 2007
2007. World Wildlife Fund (WWF). This drainage direction map for Africa defines the direction of flow from each cell in the conditioned digital elevation model to its steepest down... U.S. Geological Survey.