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update HF dataset definition files

dataset.py

@@ -1,24 +1,26 @@
+
 import os
 import datasets
 import rasterio
 import tqdm
+import datetime
 
 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.",
+            description="SSL4EO-EU Forest dataset with four-season Sentinel-2 timestamps and bounding box metadata extracted from image folders.",
             features=datasets.Features({
-                "image_path": datasets.Value("string"),
+                "image_paths": datasets.Sequence(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": {
+                "start_timestamps": datasets.Sequence(datasets.Value("timestamp[ms]")),
+                "end_timestamps": datasets.Sequence(datasets.Value("timestamp[ms]")),
+                "sentinel_tile_ids": datasets.Sequence(datasets.Value("string")),
+                "bboxes": datasets.Sequence({
                     "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},
@@ -53,7 +55,7 @@ class SSL4EOEUForest(datasets.GeneratorBasedBuilder):
         sample_id_list = sorted(os.listdir(images_dir))
         key = 0
 
-        for sample_id in tqdm.tqdm(sample_id_list, desc="Indexing samples", unit="sample"):
+        for sample_id in sample_id_list:
             sample_path = os.path.join(images_dir, sample_id)
             if not os.path.isdir(sample_path):
                 continue
@@ -63,12 +65,24 @@ class SSL4EOEUForest(datasets.GeneratorBasedBuilder):
             if not os.path.exists(mask_path):
                 continue
 
+            image_paths = []
+            start_timestamps = []
+            end_timestamps = []
+            tile_ids = []
+            bboxes = []
+
             for ts in timestamp_dirs:
                 parts = ts.split("_")
                 if len(parts) != 3:
                     continue
 
-                start_ts, end_ts, tile_id = parts
+                try:
+                    start_ts = datetime.datetime.strptime(parts[0], "%Y%m%dT%H%M%S")
+                    end_ts = datetime.datetime.strptime(parts[1], "%Y%m%dT%H%M%S")
+                except ValueError:
+                    continue
+
+                tile_id = parts[2]
                 image_path = os.path.join(sample_path, ts, "all_bands.tif")
                 if not os.path.exists(image_path):
                     continue
@@ -79,17 +93,24 @@ class SSL4EOEUForest(datasets.GeneratorBasedBuilder):
                 except Exception:
                     continue
 
+                image_paths.append(image_path)
+                start_timestamps.append(start_ts)
+                end_timestamps.append(end_ts)
+                tile_ids.append(tile_id)
+                bboxes.append({
+                    "minx": bounds.left,
+                    "maxx": bounds.right,
+                    "miny": bounds.bottom,
+                    "maxy": bounds.top
+                })
+
+            if image_paths:
                 yield key, {
-                    "image_path": image_path,
+                    "image_paths": image_paths,
                     "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
-                    }
+                    "start_timestamps": start_timestamps,
+                    "end_timestamps": end_timestamps,
+                    "sentinel_tile_ids": tile_ids,
+                    "bboxes": bboxes
                 }
                 key += 1

dataset_info.json

@@ -1 +1 @@
-{"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"}}}}
+{"description": "SSL4EO-EU Forest dataset with four-season 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_paths": {"feature": {"dtype": "string", "_type": "Value"}, "_type": "Sequence"}, "mask_path": {"dtype": "string", "_type": "Value"}, "start_timestamps": {"feature": {"dtype": "timestamp[ms]", "_type": "Value"}, "_type": "Sequence"}, "end_timestamps": {"feature": {"dtype": "timestamp[ms]", "_type": "Value"}, "_type": "Sequence"}, "sentinel_tile_ids": {"feature": {"dtype": "string", "_type": "Value"}, "_type": "Sequence"}, "bboxes": {"feature": {"minx": {"dtype": "float32", "_type": "Value"}, "maxx": {"dtype": "float32", "_type": "Value"}, "miny": {"dtype": "float32", "_type": "Value"}, "maxy": {"dtype": "float32", "_type": "Value"}}, "_type": "Sequence"}}}