 Sentinel-1SAR images provide improved crop type mapping compared to optical images alone, even under cloudy conditions. Features such as entropy, inertia, polarization ratio and local mean combined with VV imagery are the most relevant ones. At 10M resolution, speckle filtering yields better results than other configurations. Furthermore, the use of SAR imagery allows to use optical data without gap-filling, thus avoiding the need for gap-filling in cases of imperfect cloud screening. This article was authored by Jordy Inglada, Arthur Vincent, Marcella Arias and others.