A global reference database of crowdsourced cropland data collected using the Geo-Wiki platform

JC Laso Bayas, M Lesiv, F Waldner, A Schucknecht, M Duerauer, L See, S. Fritz, D Fraisl, I Moorthy, I. McCallum, C Perger, O Danylo, P Defourny, J Gallego, S Gilliams, I.H. Akhtar, S. J. Baishya, M Baruah, K Bungnamei, A CamposT Changkakati, A Cipriani, Krishna Das, Keemee Das, I Das, K.F. Davis, P Hazarika, B.A. Johnson, Ziga Malek, M.E. Molinari, K Panging, C.K. Pawe, A Pérez-Hoyos, P.K. Sahariah, D Sahariah, A Saikia, M Saikia, Peter Schlesinger, E Seidacaru, K Singha, John W Wilson

Research output: Contribution to JournalArticleAcademicpeer-review


A global reference data set on cropland was collected through a crowdsourcing campaign using the Geo-Wiki crowdsourcing tool. The campaign lasted three weeks, with over 80 participants from around the world reviewing almost 36,000 sample units, focussing on cropland identification. For quality assessment purposes, two additional data sets are provided. The first is a control set of 1,793 sample locations validated by students trained in satellite image interpretation. This data set was used to assess the quality of the crowd as the campaign progressed. The second data set contains 60 expert validations for additional evaluation of the quality of the contributions. All data sets are split into two parts: the first part shows all areas classified as cropland and the second part shows cropland average per location and user. After further processing, the data presented here might be suitable to validate and compare medium and high resolution cropland maps generated using remote sensing. These could also be used to train classification algorithms for developing new maps of land cover and cropland extent.
Original languageEnglish
Article number170136
Pages (from-to)e170136
JournalScientific Data
Publication statusPublished - 26 Sept 2017


FundersFunder number
Seventh Framework Programme603719, 617754


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