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README.md

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+---
+license: cc0-1.0
+task_categories:
+  - image-to-text
+  - text-generation
+language:
+  - en
+tags:
+  - lance
+  - historical
+  - ocr
+  - encyclopaedia
+  - britannica
+  - 18th-century
+  - 19th-century
+pretty_name: Encyclopaedia Britannica (1771-1860)
+size_categories:
+  - 100K<n<1M
+---
+
+# Encyclopaedia Britannica (1771-1860) - Lance Format
+
+This dataset contains 155,388 digitized pages from the Encyclopaedia Britannica, spanning editions from 1771 to 1860. The data is stored in **Lance format** for efficient streaming and lazy image loading.
+
+## Dataset Details
+
+- **Total Pages**: 155,388
+- **Total Volumes**: 195
+- **Format**: Lance (columnar format with blob storage for images)
+- **Source**: National Library of Scotland (NLS)
+- **License**: Public Domain (CC0)
+
+## Loading the Dataset
+
+```python
+import lance
+
+# Load from Hugging Face Hub
+ds = lance.dataset("hf://datasets/davanstrien/encyclopaedia-britannica-lance-test/data/train.lance")
+
+# Check total rows
+print(f"Total pages: {ds.count_rows()}")
+
+# Sample a few rows (metadata only, images are lazy-loaded)
+sample = ds.take([0, 100, 1000]).to_pydict()
+for i, idx in enumerate([0, 100, 1000]):
+    print(f"Page {idx}: {sample['volume_part'][i]}")
+```
+
+## Schema
+
+| Field | Type | Description |
+|-------|------|-------------|
+| `volume_id` | string | NLS volume identifier |
+| `page_number` | int32 | Page number within volume |
+| `file_identifier` | string | Base filename identifier |
+| `image` | binary (blob) | Page image (JPEG, lazy-loaded) |
+| `text` | string | OCR text extracted from ALTO XML |
+| `alto_xml` | string | Raw ALTO XML with full OCR structure |
+| `has_image` | bool | Whether page has image |
+| `has_alto` | bool | Whether page has ALTO XML |
+| `edition` | string | Edition name (e.g., "First edition") |
+| `volume_part` | string | Full volume description |
+| `publication_year` | string | Year of publication |
+| `editor` | string | Editor name |
+| `full_title` | string | Full bibliographic title |
+| `shelf_locator` | string | NLS shelf location |
+
+## Editions Included
+
+- First edition (1771)
+- Second edition (1778-1783)
+- Third edition (1788-1797)
+- Fourth edition (1801-1810)
+- Fifth edition (1815-1817)
+- Sixth edition (1820-1823)
+- Seventh edition (1830-1842)
+- Supplement editions
+
+## Source
+
+Original data from the [National Library of Scotland Data Foundry](https://data.nls.uk/data/digitised-collections/encyclopaedia-britannica/).