How can I get the geojson files to train my own dataset?

[qbs2021]

Hello! Thank you for making your work available, it is very helpful! I have a certain issue with one of the experiments I'm running using your method.

1. How can I get the geojson files to train my own dataset? I trained the model with my own data, and the results were all black. How did you get the geojson file to train your own dataset?
2. How do I get the pixelsize and their mean and standard deviation in pytorch_lydorn/torch_lydorn/torchvision/datasets/inria_aerial.py?
   Looking forward to your reply, thank you very much!