{
  "title": "ZAPBench larval zebrafish segmented-neuron centroids",
  "source_url": "https://storage.googleapis.com/zapbench-release/fluroglancer/assets/240924_dataframe_centroids.json",
  "source_bytes": 5639867,
  "source_sha256": "12ffd6a4f083db6cff53ef1e6815519ae6cfb6dd17757828b2962ccf84d2afca",
  "retrieved_utc_date": "2026-09-11",
  "count": 71721,
  "format": "Little-endian float32, interleaved x,y,z, no header; 3 floats per neuron",
  "binary_bytes": 860652,
  "binary_sha256": "3a107aacede24594d0819c61b36f1ef701597a8e2f90c01eec7c6358f5197fc3",
  "id_mapping": "zero-based row i -> segmentation label i+1; source labels verified consecutive 1..71721",
  "units": "micrometers; verified against physical segmentation metadata and exact label-1 centroid reconstruction",
  "coordinate_system": "Official fluroglancer viewer coordinate system, preserved without modification",
  "bounds_xyz": [
    [
      -240.1217313433,
      263.4568309859
    ],
    [
      -410.5191413613,
      407.6640987654
    ],
    [
      -124.0,
      129.2753623188
    ]
  ],
  "source_volume_to_viewer_transform": {
    "x_um": "(native_y_voxel - 664) * 0.406",
    "y_um": "-(native_x_voxel - 1024) * 0.406",
    "z_um": "(native_z_voxel - 36) * 4",
    "verification": "Exact agreement for independently retrieved segmentation label 1; do not claim unverified anatomical side names"
  },
  "native_segmentation_metadata_url": "https://storage.googleapis.com/zapbench-release/volumes/20240930/segmentation/zarr.json",
  "native_volume_shape_xyz": [
    2048,
    1328,
    72
  ],
  "native_volume_voxel_size_nm": [
    406,
    406,
    4000
  ],
  "anatomical_orientation": "Anatomical left/right, rostral/caudal and dorsal/ventral signs not documented in retrieved metadata; display source-coordinate axes, not inferred anatomical labels.",
  "region_labels": null,
  "connectivity": null,
  "activity": null,
  "license": "CC-BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "license_evidence_url": "https://zapbench-release.storage.googleapis.com/volumes/README.html",
  "attribution": "ZAPBench; activity acquired by Alex Bo-Yuan Chen in the Ahrens lab, HHMI Janelia; segmentation annotations by the CellMap Project Team, HHMI Janelia; processing, alignment, segmentation and trace extraction by Google Research. Data CC-BY 4.0.",
  "paper_url": "https://openreview.net/forum?id=oCHsDpyawq",
  "official_viewer_url": "https://storage.googleapis.com/zapbench-release/fluroglancer/open.html",
  "official_loader_source_url": "https://github.com/google-research/zapbench/blob/main/fluroglancer/src/js/globals.js",
  "official_geometry_source_url": "https://github.com/google-research/zapbench/blob/main/fluroglancer/src/js/geometry.js",
  "processing": [
    "Preserved all original points and ordering for binary file",
    "Converted float64 JSON values to float32",
    "8192-point JSON sample selected uniformly without replacement using Python random seed 20260911; rounded to 4 decimal places"
  ],
  "limitations": [
    "These are centroids from cell segmentation of functional imaging, not synapse-resolved connections.",
    "The asset does not contain validated regional labels or activity traces.",
    "Any simulated colors or activity applied by an app must be labeled as simulation, independently of these real anatomical positions."
  ]
}