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The dataset viewer is not available for this split.
Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code:   StreamingRowsError
Exception:    CastError
Message:      Couldn't cast
status: string
row_count: int64
parent_image_count: int64
pixel_verified_count: int64
multi_valid_target_rows: int64
error_count: int64
errors: list<item: null>
  child 0, item: null
validation_scope: string
manifest: string
manifest_sha256: string
license: string
official_source: string
revision: string
images: struct<url: string, bytes: int64, sha256: string>
  child 0, url: string
  child 1, bytes: int64
  child 2, sha256: string
storage_mode: string
checked_at: timestamp[s]
dataset: string
heldout_annotations: struct<testA: struct<url: string, bytes: int64, sha256: string>, testB: struct<url: string, bytes: i (... 22 chars omitted)
  child 0, testA: struct<url: string, bytes: int64, sha256: string>
      child 0, url: string
      child 1, bytes: int64
      child 2, sha256: string
  child 1, testB: struct<url: string, bytes: int64, sha256: string>
      child 0, url: string
      child 1, bytes: int64
      child 2, sha256: string
csv_entry: null
annotations: struct<url: string, bytes: int64, sha256: string>
  child 0, url: string
  child 1, bytes: int64
  child 2, sha256: string
source_split: string
to
{'dataset': Value('string'), 'csv_entry': Value('null'), 'status': Value('string'), 'checked_at': Value('timestamp[s]'), 'storage_mode': Value('string'), 'revision': Value('string'), 'official_source': Value('string'), 'license': Value('string'), 'source_split': Value('string'), 'annotations': {'url': Value('string'), 'bytes': Value('int64'), 'sha256': Value('string')}, 'heldout_annotations': {'testA': {'url': Value('string'), 'bytes': Value('int64'), 'sha256': Value('string')}, 'testB': {'url': Value('string'), 'bytes': Value('int64'), 'sha256': Value('string')}}, 'images': {'url': Value('string'), 'bytes': Value('int64'), 'sha256': Value('string')}}
because column names don't match
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 147, in get_rows_or_raise
                  return get_rows(
                      dataset=dataset,
                  ...<4 lines>...
                      column_names=column_names,
                  )
                File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
                  return func(*args, **kwargs)
                File "/src/services/worker/src/worker/utils.py", line 127, in get_rows
                  rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
                File "/src/services/worker/src/worker/utils.py", line 483, in safe_iter
                  yield from ds.decode(False) if ds.features else ds
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2951, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2461, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2486, in _iter_arrow
                  for key, pa_table in self.ex_iterable._iter_arrow():
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 547, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 430, in _iter_arrow
                  for key, pa_table in self.generate_tables_fn(**gen_kwags):
                                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
                  self._cast_table(pa_table, json_field_paths=json_field_paths),
                  ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
                  pa_table = table_cast(pa_table, self.info.features.arrow_schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2378, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
                  raise CastError(
                  ...<3 lines>...
                  )
              datasets.table.CastError: Couldn't cast
              status: string
              row_count: int64
              parent_image_count: int64
              pixel_verified_count: int64
              multi_valid_target_rows: int64
              error_count: int64
              errors: list<item: null>
                child 0, item: null
              validation_scope: string
              manifest: string
              manifest_sha256: string
              license: string
              official_source: string
              revision: string
              images: struct<url: string, bytes: int64, sha256: string>
                child 0, url: string
                child 1, bytes: int64
                child 2, sha256: string
              storage_mode: string
              checked_at: timestamp[s]
              dataset: string
              heldout_annotations: struct<testA: struct<url: string, bytes: int64, sha256: string>, testB: struct<url: string, bytes: i (... 22 chars omitted)
                child 0, testA: struct<url: string, bytes: int64, sha256: string>
                    child 0, url: string
                    child 1, bytes: int64
                    child 2, sha256: string
                child 1, testB: struct<url: string, bytes: int64, sha256: string>
                    child 0, url: string
                    child 1, bytes: int64
                    child 2, sha256: string
              csv_entry: null
              annotations: struct<url: string, bytes: int64, sha256: string>
                child 0, url: string
                child 1, bytes: int64
                child 2, sha256: string
              source_split: string
              to
              {'dataset': Value('string'), 'csv_entry': Value('null'), 'status': Value('string'), 'checked_at': Value('timestamp[s]'), 'storage_mode': Value('string'), 'revision': Value('string'), 'official_source': Value('string'), 'license': Value('string'), 'source_split': Value('string'), 'annotations': {'url': Value('string'), 'bytes': Value('int64'), 'sha256': Value('string')}, 'heldout_annotations': {'testA': {'url': Value('string'), 'bytes': Value('int64'), 'sha256': Value('string')}, 'testB': {'url': Value('string'), 'bytes': Value('int64'), 'sha256': Value('string')}}, 'images': {'url': Value('string'), 'bytes': Value('int64'), 'sha256': Value('string')}}
              because column names don't match

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PathGrounding

Public, portable auxiliary training data for single-step pathology grounding. The main package contains 235,346 quality-filtered parent-child pairs from seven sources, with 38,836 distinct parent images. It replaces the earlier unfiltered 618,432-pair main release.

SegPath is a separate, optional package under segpath/: 2,193,058 pairs and 105,864 parents. It is not merged into the main manifest, counts, reader or sampling configuration. It is disabled by default. Download it explicitly only when needed; its mostly small semantic-region boxes differ from the larger region-of-interest navigation targets in ZoomPath v4.

These are auxiliary training data, not the ZoomPath v4 benchmark. They contain no raw WSIs and have not inherited the benchmark's doctor/pathologist review. Upstream licenses and restrictions apply; RefPath is gated and redistribution permission is not assumed; users must follow all relevant upstream terms. SegPath is CC-BY-NC-SA 4.0.

Main Package

Source Retained pairs
BCSS 2,836
Lizard 31,446
MIDOGpp 8,008
NuCLS 32,538
NuInsSeg 20,521
PanNuke 111,605
RefPath train 28,392
Main total, excluding SegPath 235,346

Each record includes parent/child images, an exact parent-relative child box, text question, organ and available scale metadata. partition is training; original source split/fold information is retained, with no new train/val/test split. Keep all related targets/parents, and source slides when identifiable, together when defining later splits.

Python 3.10+ is required. The repository is public; authentication is not required for downloads. The explicit allow-list below does not download SegPath:

pip install -U huggingface_hub pillow
from huggingface_hub import snapshot_download

snapshot_download(
    repo_id="xuxuxuxuxu/PathGrounding",
    repo_type="dataset",
    local_dir="/data/pathgrounding-download",
    allow_patterns=["README.md", "release_manifest.json", "package/**",
                    "archives/**", "tools/restore_package.py"],
)
python /data/pathgrounding-download/tools/restore_package.py \
  /data/pathgrounding-download /data/zoompath_training_v4
export PYTHONPATH=/data/zoompath_training_v4:$PYTHONPATH
from training_data import AuxiliaryTrainingReader

reader = AuxiliaryTrainingReader("/data/zoompath_training_v4")
row = next(reader.iter_records(dataset="refpath_train"))
sample = reader.load_pair(row)
parent, child = sample["parent_image"], sample["child_image"]
question = sample["question"]
selected_box = sample["child_bbox_xyxy_in_parent"]
valid_boxes = sample["valid_target_bboxes_xyxy_in_parent"]
ignored_boxes = sample["ignored_target_bboxes_xyxy_in_parent"]
organ, mpp, level = sample["organ"], sample["mpp"], sample["level"]

The main images and annotations are uncompressed TAR shards, approximately 2 GiB each. Restoration verifies SHA-256 and recreates relative paths without resizing or changing questions. It is resumable by rerunning the command. Use a dedicated output directory and allow space for both the downloaded shards and the restored package. Exact byte totals are in release_manifest.json.

Coordinates are integer pixel XYXY, top-left origin, half-open edges. Children are exact crops. For multi-target supervision, use all eligible valid_boxes, not every annotated box or only the selected one. Source-supported answers rejected by quality filtering remain ignored_boxes, never negatives. The reader checks the exact label/expression and target count. Stream JSONL; uniform row sampling is not uniform parent/query sampling.

level means the training category high/mid/low, not a WSI pyramid index. MPP is microns per pixel; nominal RefPath magnification/MPP are approximate and explicitly flagged. Unsupported metadata remains null.

Optional SegPath

Download only the independent SegPath package:

from huggingface_hub import snapshot_download

snapshot_download(
    repo_id="xuxuxuxuxu/PathGrounding",
    repo_type="dataset",
    local_dir="/data/pathgrounding-download",
    allow_patterns=["segpath/**", "tools/verify_segpath_package.py"],
)
python /data/pathgrounding-download/tools/verify_segpath_package.py \
  /data/pathgrounding-download/segpath
export PYTHONPATH=/data/pathgrounding-download/segpath:$PYTHONPATH

Use AuxiliaryTrainingReader("/data/pathgrounding-download/segpath") in a separate reader/import context from the main package. The SegPath reader loads images and annotations directly from eight native, uncompressed marker TARs; no extraction is required. Reserve approximately 210 GiB plus download-cache headroom. segpath/release_manifest.json gives the exact total and checksums.

Only official training patches are included. Targets are 8-connected semantic mask regions, not cell instances or WSI navigation paths. Questions use full labels. Known organs are retained; unknown organs are null. All rows record 40x, approximate MPP [0.25, 0.25], and training level high.

SegPath's sampling_config.json sets enabled_by_default: false and default_mix_probability: 0.0. No combined manifest is provided. An explicitly chosen future experiment should cap its contribution and sample marker, then parent/query, then target, rather than concatenate rows and sample uniformly.

Layout And Validation

Repository path Contents
package/ Main manifest, index, reader, quality policy, decisions, reports and provenance
archives/ Main parent/child images and per-parent annotations
release_manifest.json Main-only inventory, counts, sizes and SHA-256 checksums
tools/restore_package.py Main package checksum verification and restoration
segpath/ Independent optional SegPath manifest, index, TARs, reader and provenance
segpath/release_manifest.json SegPath-only inventory, counts, sizes and checksums
tools/verify_segpath_package.py SegPath checksums and sample loading check

Both packages report pass with zero errors in their own validation.json and quality_validation.json. The main export checks all 235,346 rows and 38,836 annotation views, with 700 deterministic crop-pixel samples. SegPath checks all 2,193,058 rows and 105,864 annotation views, with 1,000 deterministic crop-pixel rechecks; its source audit reconstructs every retained parent's original mask. These automated audits are not a claim of a new manual or physician review.

The main package preserves historical source metadata showing SegPath excluded from that build; this is intentional and does not invalidate the independent validated segpath/ release. Read each package's methods, quality policy, filter results and provenance before training. Pin a Hub commit revision for reproducible downloads.

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