BURNT AREAS SEMANTIC SEGMENTATION FROM SENTINEL DATA USING THE U-NET NETWORK TRAINED WITH SEMI-AUTOMATED ANNOTATIONS - Marra, A. B.; Galo, M. L. B. T.; Giulio Tonolo, F.; Sano, E. E.; Orlando, V. S. W. (Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., 2023)