Fig. 3

Distribution of training and validation data for each ice shelf or glacier. Training data is plotted in light blue, validation data in dark blue. Violet and grey dots indicate the polarization of the used satellite imagery. For training, the dual polarized image was additionally used to train weights for single polarized imagery by using only the first channel (HH polarization). Circles and triangles indicate whether the entire front or a part of it was used for training/validation.