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Refresh: 1538 meshes of 323 segments, 0 not measured (kit f12009b, 915 s)

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  1. README.md +70 -0
  2. atlas.csv +0 -0
  3. atlas.jsonl +0 -0
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README.md ADDED
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+ ---
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+ license: cc-by-nc-4.0
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+ pretty_name: Vesuvius Segment Atlas
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+ tags:
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+ - vesuvius-challenge
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+ - herculaneum
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+ - tifxyz
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+ - segmentation
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+ configs:
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+ - config_name: default
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+ data_files:
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+ - split: train
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+ path: atlas.csv
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+ ---
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+
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+ # Vesuvius Segment Atlas
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+
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+ The same geometry numbers for every traced segment the [Vesuvius Challenge open data](https://vesuvius-challenge-open-data.s3.us-east-1.amazonaws.com/) publishes:
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+ one row per tifxyz mesh (a segment mapped to one scan volume), with its area in cm2, how much of its grid is filled,
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+ how isometric the grid is, and how many grid nodes sit in holes inside the sheet, in folds, or on over-stretched
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+ edges. Built by `python -m kit atlas build` from [ChaseHendrick/Scrolls](https://github.com/ChaseHendrick/Scrolls)
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+ (page: `docs/tools/atlas.md`), refreshed daily by a Hugging Face Job that measures only new or changed meshes.
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+
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+ Built 2026-10-24T00:47:43Z from commit `f12009b`: 1538 meshes of 323
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+ segments, 0 not measured (the `error` column says why).
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+
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+ | Scroll | Segments | Meshes | Measured | Clean | Area, cm2 (each segment once) | Prize lists (kit snapshot) |
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+ | --- | --- | --- | --- | --- | --- | --- |
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+ | PHerc0009B | 18 | 72 | 72 | 32 | 348.8 | none |
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+ | PHerc0139 | 39 | 266 | 266 | 13 | 1208.1 | none |
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+ | PHerc0172 | 53 | 212 | 212 | 0 | 7067.3 | none |
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+ | PHerc0332 | 2 | 2 | 2 | 0 | 0.0 | none |
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+ | PHerc0343P | 8 | 32 | 32 | 25 | 32.5 | none |
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+ | PHerc0500P2 | 46 | 231 | 231 | 85 | 262.0 | none |
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+ | PHerc0800 | 6 | 18 | 18 | 15 | 9.5 | first-letters-2027, grand-prize-2027 |
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+ | PHerc0814 | 19 | 94 | 94 | 5 | 467.8 | none |
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+ | PHerc0841 | 3 | 12 | 12 | 0 | 36.2 | none |
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+ | PHerc1447 | 15 | 49 | 49 | 0 | 72.2 | grand-prize-2027 |
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+ | PHerc1667 | 20 | 119 | 119 | 0 | 2178.2 | none |
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+ | PHercMAN5 | 1 | 1 | 1 | 0 | 0.0 | none |
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+ | PHercMANBp | 11 | 11 | 11 | 0 | 0.0 | none |
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+ | PHercParis4 | 82 | 419 | 419 | 0 | 46726.8 | first-title |
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+
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+ ## What the numbers mean
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+
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+ - **area_cm2**: two triangles per complete grid cell, in voxels squared, times the voxel size squared. The voxel
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+ size comes from the folder name (`-N.NNNum.tifxyz`), else from the volume's metadata, else from the scroll's only
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+ volume (`voxel_um_from` says which); without one the area is empty. **meta_area_ratio** is our area over the
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+ `area_vx2` VC3D wrote into `meta.json`, where there is one.
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+ - **edge_p5, edge_p50, edge_p95**: every grid edge's 3D length over the step `meta.json`'s `scale` promises (1.0 is
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+ exact); **within_10pct** and **within_25pct** are the shares of edges that close; **median_abs_log** is the median
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+ of the absolute log of that ratio; **cell_area_p50** is cell area over the promised area; **angle_p5/p50/p95** is
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+ the angle between the two grid directions, in degrees (90 is square).
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+ - **holes_nodes**: missing nodes not joined to the grid's border through missing nodes (holes inside the sheet).
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+ **folds_nodes**: nodes of neighboring cells whose normals turn by more than 90 degrees. **stretched_nodes**: nodes
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+ on an edge more than 1.5 times too long or too short. Each also in mm2. **clean** is true when all three are 0.
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+ - **kind** is `mesh` for a top-level mesh folder and the subfolder name (such as `intermediate`) otherwise. Area per
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+ scroll in the table counts each segment once, from its finest-voxel top-level mesh.
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+ - **lens**: for scrolls on no prize list, the file in `lens/` with a small preview grid used by the Segment Lens
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+ viewer (format in `docs/tools/atlas.md`). Scrolls on a prize list get numbers only.
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+ - **fingerprint** comes from the ETags and sizes of x.tif, y.tif and z.tif; a refresh measures a mesh again only when
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+ it changes.
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+
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+ These numbers describe the grid, not the papyrus. A clean mesh can still jump from one sheet to the next; nothing
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+ here looks at the CT or judges ink, and none of it is an official villa or prize check.
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+
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+ ## License and credit
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+
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+ The meshes are Vesuvius Challenge open data, CC BY-NC 4.0; these derived numbers and preview grids carry the same
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+ license. Credit: Vesuvius Challenge open data, CC BY-NC 4.0. The code that makes them is Apache-2.0.
atlas.csv ADDED
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