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"Geo-reCAPTCHA: Crowdsourcing large amounts of geographic information from ..."
Florian Hillen, Bernhard Höfle (2015)
- Florian Hillen, Bernhard Höfle
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Geo-reCAPTCHA: Crowdsourcing large amounts of geographic information from earth observation data. Int. J. Appl. Earth Obs. Geoinformation 40: 29-38 (2015)
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