New highres Bing Imagery is available in Mali, at least around Gao in the north 
part along the Niger river.  This Imagery let us reconsider where to trace the 
Niger riverbanks. This Imagery was taken at high water and in many parts we see 
flooded farmlands.  This brings the question about where should we trace the 
riverbank. If at high water levels, many villages will be in the middle of 
rivers or lakes. For areas like the Niger river, what should be the rule?

 
Pierre 
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