 Cropland mapping relies heavily on field data for algorithm calibration, making it, in many cases, applicable only at the field campaign scale. The recently launched Sentinel-2 satellite will be able to deliver time series over large regions, but it will not really be compatible with the current mapping approach or available in SITDA data. This article was authored by Nicholas Madden, Guadalupe Sepulcher-Conto, François Waldner, and others.