The grand challenges facing environmental citizen science by Steffen Fritz, Linda See, François Grey

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The Rise of Collaborative Mapping: Trends and Future Directions by Jan de Leeuw, Linda See, Steffen Fritz

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Local Knowledge and Professional Background Have a Minimal Impact on Volunteer Citizen Science Performance in a Land-Cover Classification Task by Carl Salk, Tobias Sturn, Linda See, Steffen Fritz

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Mapping Priorities to Focus Cropland Mapping Activities: Fitness Assessment of Existing Global, Regional and National Cropland Maps by François Waldner, Steffen Fritz, Antonio Di Gregorio, Pierre Defourny

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Geography Geo-Wiki in the Classroom: Using Crowdsourcing to Enhance Geographical Teaching by Christoph Perger, Ellsworth LeDrew, Linda See, Steffen Fritz

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Optimizing Crowdsourced Land Use and Land Cover Data Collection: A Two-Stage Approach by Elena Moltchanova, Myroslava Lesiv, Linda See, Julie Mugford, Steffen Fritz

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Land Use Increases the Correlation between Tree Cover and Biomass Carbon Stocks in the Global Tropics by Manan Bhan, Simone Gingrich, Sarah Matej, Steffen Fritz, Karl-Heinz Erb

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Remote sensing data for managing climate risks: Index-based insurance and growth related applications for smallhold-farmers in Ethiopia by Stefan Hochrainer-Stigler, Marijn van der Velde, Steffen Fritz, Georg Pflug

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A Continental Assessment of the Drivers of Tropical Deforestation With a Focus on Protected Areas by Steffen Fritz, Steffen Fritz, Juan Carlos Laso Bayas, Linda See, Dmitry Schepaschenko, Dmitry Schepaschenko, Florian Hofhansl, Martin Jung, Martina Dürauer, Ivelina Georgieva, Olga Danylo, Myroslava Lesiv, Ian McCallum

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How many people need to classify the same image? A method for optimizing volunteer contributions in binary geographical classifications. by Carl Salk, Elena Moltchanova, Linda See, Tobias Sturn, Ian McCallum, Steffen Fritz

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Geo-Wiki.Org: The Use of Crowdsourcing to Improve Global Land Cover by Florian Kraxner, Michael Obersteiner, Frédéric Achard, Roland Grillmayer, Christoph Perger, Ian McCallum, Christian Schill, Steffen Fritz

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Affordable nutrient solutions for improved food security as evidenced by crop trials. by Marijn van der Velde, Linda See, Liangzhi You, Juraj Balkovič, Steffen Fritz, Nikolay Khabarov, Michael Obersteiner, Stanley Wood

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Investigating the Feasibility of Geo-Tagged Photographs as Sources of Land Cover Input Data by Vyron Antoniou, Cidália Costa Fonte, Linda See, Jacinto Estima, Jamal Jokar Arsanjani, Flavio Lupia, Marco Minghini, Giles Foody, Steffen Fritz

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A map of the extent and year of detection of oil palm plantations in Indonesia, Malaysia and Thailand by Olga Danylo, Johannes Pirker, Guido Lemoine, Guido Ceccherini, Linda See, Ian McCallum, Hadi, Florian Kraxner, Frédéric Achard, Steffen Fritz

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Building a community-based open harmonised reference data repository for global crop mapping. by Hendrik Boogaard, Arun Kumar Pratihast, Juan Carlos Laso Bayas, Santosh Karanam, Steffen Fritz, Kristof Van Tricht, Jeroen Degerickx, Sven Gilliams

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Characterizing the Spatial and Temporal Availability of Very High Resolution Satellite Imagery in Google Earth and Microsoft Bing Maps as a Source of Reference Data by Myroslava Lesiv, Linda See, Juan Carlos Laso Bayas, Tobias Sturn, Dmitry Schepaschenko, Mathias Karner, Inian Moorthy, Ian McCallum, Steffen Fritz

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Comparing the quality of crowdsourced data contributed by expert and non-experts. by Linda See, Alexis Comber, Carl Salk, Steffen Fritz, Marijn van der Velde, Christoph Perger, Christian Schill, Ian McCallum, Florian Kraxner, Michael Obersteiner

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Investigating the Use of Street-Level Imagery and Deep Learning to Produce In-Situ Crop Type Information by Fernando Orduna-Cabrera, Marcial Sandoval-Gastelum, Ian McCallum, Linda See, Steffen Fritz, Santosh Karanam, Tobias Sturn, Valeria Javalera-Rincon, Felix F. Gonzalez-Navarro

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An Experimental Framework for Integrating Citizen and Community Science into Land Cover, Land Use, and Land Change Detection Processes in a National Mapping Agency by Ana-Maria Olteanu-Raimond, Laurence Jolivet, Marie-Dominque Van Damme, Timothée Royer, Ludovic Fraval, Linda See, Tobias Sturn, Mathias Karner, Inian Moorthy, Steffen Fritz

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Crowdsourcing LUCAS: Citizens Generating Reference Land Cover and Land Use Data with a Mobile App by Juan Carlos Laso Bayas, Linda See, Hedwig Bartl, Tobias Sturn, Mathias Karner, Dilek Fraisl, Inian Moorthy, Michaela Busch, Marijn van der Velde, Steffen Fritz

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