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add custom dataset loading script and corresponding meta data

dataset.py

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+import os
+import datasets
+import rasterio
+import tqdm
+
+class SSL4EOEUForest(datasets.GeneratorBasedBuilder):
+    def _info(self):
+        return datasets.DatasetInfo(
+            description="SSL4EO-EU Forest dataset with four-season of Sentinel-2 timestamps and bounding box metadata extracted from image folders.",
+            features=datasets.Features({
+                "image_path": datasets.Value("string"),
+                "mask_path": datasets.Value("string"),
+                "start_timestamp": datasets.Value("string"),
+                "end_timestamp": datasets.Value("string"),
+                "sentinel_tile_id": datasets.Value("string"),
+                "bbox": {
+                    "minx": datasets.Value("float32"),
+                    "maxx": datasets.Value("float32"),
+                    "miny": datasets.Value("float32"),
+                    "maxy": datasets.Value("float32"),
+                }
+            }),
+            citation="""@misc{ssl4eo_eu_forest,
+  author = {Nassim Ait Ali Braham and Conrad M Albrecht},
+  title = {SSL4EO-EU Forest Dataset},
+  year = {2025},
+  howpublished = {https://huggingface.co/datasets/dm4eo/ssl4eo-eu-forest},
+  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.}
+}""",
+            homepage="https://www.evo-land.eu",
+            license="CC-BY-4.0",
+        )
+
+    def _split_generators(self, dl_manager):
+        use_local = os.environ.get("HF_DATASET_LOCAL", "false").lower() == "true"
+
+        if use_local:
+            root = os.path.abspath(".")
+        else:
+            root = dl_manager.download_and_extract(".")
+
+        images_dir = os.path.join(root, "images")
+        masks_dir = os.path.join(root, "masks")
+
+        return [
+            datasets.SplitGenerator(name=datasets.Split("all"), gen_kwargs={
+                "images_dir": images_dir,
+                "masks_dir": masks_dir
+            })
+        ]
+
+    def _generate_examples(self, images_dir, masks_dir):
+        sample_id_list = sorted(os.listdir(images_dir))
+        key = 0
+
+        for sample_id in tqdm.tqdm(sample_id_list, desc="Indexing samples", unit="sample"):
+            sample_path = os.path.join(images_dir, sample_id)
+            if not os.path.isdir(sample_path):
+                continue
+
+            timestamp_dirs = sorted(os.listdir(sample_path))
+            mask_path = os.path.join(masks_dir, sample_id, "mask.tif")
+            if not os.path.exists(mask_path):
+                continue
+
+            for ts in timestamp_dirs:
+                parts = ts.split("_")
+                if len(parts) != 3:
+                    continue
+
+                start_ts, end_ts, tile_id = parts
+                image_path = os.path.join(sample_path, ts, "all_bands.tif")
+                if not os.path.exists(image_path):
+                    continue
+
+                try:
+                    with rasterio.open(image_path) as src:
+                        bounds = src.bounds
+                except Exception:
+                    continue
+
+                yield key, {
+                    "image_path": image_path,
+                    "mask_path": mask_path,
+                    "start_timestamp": start_ts,
+                    "end_timestamp": end_ts,
+                    "sentinel_tile_id": tile_id,
+                    "bbox": {
+                        "minx": bounds.left,
+                        "maxx": bounds.right,
+                        "miny": bounds.bottom,
+                        "maxy": bounds.top
+                    }
+                }
+                key += 1

dataset_info.json

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+{"description": "SSL4EO-EU Forest dataset with four-season of Sentinel-2 timestamps and bounding box metadata extracted from image folders.", "citation": "@misc{ssl4eo_eu_forest,\n  author = {Nassim Ait Ali Braham and Conrad M Albrecht},\n  title = {SSL4EO-EU Forest Dataset},\n  year = {2025},\n  howpublished = {https://huggingface.co/datasets/dm4eo/ssl4eo-eu-forest},\n  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.}\n}", "homepage": "https://www.evo-land.eu", "license": "CC-BY-4.0", "features": {"image_path": {"dtype": "string", "_type": "Value"}, "mask_path": {"dtype": "string", "_type": "Value"}, "start_timestamp": {"dtype": "string", "_type": "Value"}, "end_timestamp": {"dtype": "string", "_type": "Value"}, "sentinel_tile_id": {"dtype": "string", "_type": "Value"}, "bbox": {"minx": {"dtype": "float32", "_type": "Value"}, "maxx": {"dtype": "float32", "_type": "Value"}, "miny": {"dtype": "float32", "_type": "Value"}, "maxy": {"dtype": "float32", "_type": "Value"}}}}