info:oai:pure.iiasa.ac.at:13866info:ofi/fmt:xml:xsd:journalSeeL.See, L.FritzS.Fritz, S.DiasE.Dias, E.HendriksE.Hendriks, E.MijlingB.Mijling, B.SnikF.Snik, F.StammesP.Stammes, P.VescoviF.D.Vescovi, F.D.ZeugG.Zeug, G.MathieuP.-P.Mathieu, P.-P.DesnosY.-L.Desnos, Y.-L.RastM.Rast, M.3420162473-2397Supporting Earth-Observation Calibration and Validation: A new generation of tools for crowdsourcing and citizen scienceIEEE Geoscience and Remote Sensing Magazine38-50article