Large-Scale Crop Mapping From Multisource Remote Sensing Images in Google Earth Engine. - Xinkai Liu; Han Zhai; Yonglin Shen; Benke Lou; Changmin Jiang; Tianqi Li; Sayed Bilal Hussain; Guoling Shen (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2020)