RESEARCH DATA · RELEASE 2026.09
Download the archive as data
Versioned exports make the site reproducible outside the interface. Each release has metadata, licence information, and SHA-256 checksums.
| Format | Use | Download |
|---|---|---|
| JSON | Complete normalized records | records.json |
| CSV | Spreadsheet/statistical workflows | records.csv |
| NDJSON | Streaming/scripting | records.ndjson |
| GeoJSON | Modern orientation/reference points plus qualified source-controlled historical boundary research envelopes; null geometry where none is asserted | places.geojson |
| Historical geography manifest | Coordinate roles, qualified historical-boundary status, evidence requirements, uncertainty metadata and boundary counts | historical-geography.json |
| Historical geography source evidence | Candidate source works, exact source-object provenance and page-level geometry-evidence status | historical-geography-evidence.json |
| Metadata | Version and counts | release.json |
| Checksums | Integrity verification | SHA256SUMS.txt |
Data dictionary
type record family; id stable identifier; status/evidence/source provenance fields; period/region context; sections supplied structure; purvapaksha/uttarapaksha/synthesis debate fields; url permanent address.
Rights
Original structured data is CC BY 4.0. Book covers, reproduced manuscripts, quoted third-party material, map bases, and linked external editions are excluded unless separately marked.