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See: Fritz, S., I. McCallum, et al. (2009). “Geo-wiki. org: The use of crowdsourcing to improve global land cover.” Remote Sensing 1(3): 345-354.
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See: Fritz, S., I. McCallum, et al. (2009). “Geo-wiki. org: The use of crowdsourcing to improve global land cover.” Remote Sensing 1(3): 345-354.
