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| import os
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| import datasets
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| import rasterio
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| import tqdm
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| import datetime
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|
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| class SSL4EOEUForest(datasets.GeneratorBasedBuilder):
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| def _info(self):
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| return datasets.DatasetInfo(
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| description="SSL4EO-EU Forest dataset with four-season Sentinel-2 timestamps and bounding box metadata extracted from image folders.",
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| features=datasets.Features({
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| "image_paths": datasets.Sequence(datasets.Value("string")),
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| "mask_path": datasets.Value("string"),
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| "start_timestamps": datasets.Sequence(datasets.Value("timestamp[ms]")),
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| "end_timestamps": datasets.Sequence(datasets.Value("timestamp[ms]")),
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| "sentinel_tile_ids": datasets.Sequence(datasets.Value("string")),
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| "bboxes": datasets.Sequence({
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| "minx": datasets.Value("float32"),
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| "maxx": datasets.Value("float32"),
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| "miny": datasets.Value("float32"),
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| "maxy": datasets.Value("float32"),
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| })
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| }),
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| citation="""@misc{ssl4eo_eu_forest,
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| author = {Nassim Ait Ali Braham and Conrad M Albrecht},
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| title = {SSL4EO-EU Forest Dataset},
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| year = {2025},
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| howpublished = {https://huggingface.co/datasets/dm4eo/ssl4eo-eu-forest},
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| note = {This work was carried under the EvoLand project, cf. https://www.evo-land.eu . This project has received funding from the European Union's Horizon Europe research and innovation programme under grant agreement No. 101082130.}
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| }""",
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| homepage="https://www.evo-land.eu",
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| license="CC-BY-4.0",
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| )
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|
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| def _split_generators(self, dl_manager):
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| use_local = os.environ.get("HF_DATASET_LOCAL", "false").lower() == "true"
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|
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| if use_local:
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| root = os.path.abspath(".")
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| else:
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| root = dl_manager.download_and_extract(".")
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|
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| images_dir = os.path.join(root, "images")
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| masks_dir = os.path.join(root, "masks")
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|
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| return [
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| datasets.SplitGenerator(name=datasets.Split("all"), gen_kwargs={
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| "images_dir": images_dir,
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| "masks_dir": masks_dir
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| })
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| ]
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|
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| def _generate_examples(self, images_dir, masks_dir):
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| sample_id_list = sorted(os.listdir(images_dir))
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| key = 0
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|
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| for sample_id in sample_id_list:
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| sample_path = os.path.join(images_dir, sample_id)
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| if not os.path.isdir(sample_path):
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| continue
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|
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| timestamp_dirs = sorted(os.listdir(sample_path))
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| mask_path = os.path.join(masks_dir, sample_id, "mask.tif")
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| if not os.path.exists(mask_path):
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| continue
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|
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| image_paths = []
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| start_timestamps = []
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| end_timestamps = []
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| tile_ids = []
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| bboxes = []
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|
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| for ts in timestamp_dirs:
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| parts = ts.split("_")
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| if len(parts) != 3:
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| continue
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|
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| try:
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| start_ts = datetime.datetime.strptime(parts[0], "%Y%m%dT%H%M%S")
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| end_ts = datetime.datetime.strptime(parts[1], "%Y%m%dT%H%M%S")
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| except ValueError:
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| continue
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|
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| tile_id = parts[2]
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| image_path = os.path.join(sample_path, ts, "all_bands.tif")
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| if not os.path.exists(image_path):
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| continue
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|
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| try:
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| with rasterio.open(image_path) as src:
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| bounds = src.bounds
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| except Exception:
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| continue
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|
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| image_paths.append(image_path)
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| start_timestamps.append(start_ts)
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| end_timestamps.append(end_ts)
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| tile_ids.append(tile_id)
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| bboxes.append({
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| "minx": bounds.left,
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| "maxx": bounds.right,
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| "miny": bounds.bottom,
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| "maxy": bounds.top
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| })
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|
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| if image_paths:
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| yield key, {
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| "image_paths": image_paths,
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| "mask_path": mask_path,
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| "start_timestamps": start_timestamps,
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| "end_timestamps": end_timestamps,
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| "sentinel_tile_ids": tile_ids,
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| "bboxes": bboxes
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| }
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| key += 1
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|
|
