TGAZ SQLite release 20260325

README.md

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+---
+license: other
+license_name: chgis-tgaz
+license_link: https://chgis.fairbank.fas.harvard.edu/
+pretty_name: TGAZ (Temporal Gazetteer) SQLite
+language:
+  - zh
+  - en
+  - bo
+tags:
+  - history
+  - gazetteer
+  - china
+  - historical-gis
+  - sqlite
+size_categories:
+  - 10K<n<100K
+---
+
+# TGAZ-SQLite
+
+The **Temporal Gazetteer (TGAZ)** of the China Historical GIS (CHGIS) as one SQLite file.
+It has 82,117 historical placenames from 763 BCE to 1911 CE, with 245,042 spellings
+(simplified and traditional Chinese, pinyin, Tibetan), jurisdiction links over time,
+and historical notes.
+
+## Files
+
+| File | What it is |
+|---|---|
+| `tgaz_20260325.zip` | the database (`tgaz.db`, 228 MB unzipped, 62 MB zipped) |
+| `latest.json` | the current release: file name, SHA-256 checksums, download URL |
+
+## Download
+
+The easiest way is the `setup` command of the
+[tgaz-sqlite skill](https://github.com/kltng/humanities-skills/tree/main/tgaz-sqlite):
+
+```bash
+python3 scripts/query_tgaz.py setup     # downloads, checks the checksum, unzips
+```
+
+It puts the file at `~/.local/share/sino-authorities/tgaz.db`. By hand:
+
+```bash
+curl -L -o tgaz.zip https://huggingface.co/datasets/kltng/tgaz-sqlite/resolve/main/tgaz_20260325.zip
+unzip tgaz.zip      # gives tgaz.db
+```
+
+## Source and credit
+
+- Data: [China Historical GIS](https://chgis.fairbank.fas.harvard.edu/) (Harvard University and
+  Fudan University), with records from the Tibetan Buddhist Resource Center (3,587) and the
+  Historical Gazetteer of Russia (761).
+- Converted from the MySQL dump in
+  [fccs-dci/containerized_tgaz](https://github.com/fccs-dci/containerized_tgaz) with the scripts in
+  [kltng/tgaz-sqlite](https://github.com/kltng/tgaz-sqlite). The live API is at
+  https://chgis.hudci.org/tgw/.
+- The upstream data has no explicit licence file. Credit CHGIS when you use it, and check the
+  CHGIS site for terms of use. The conversion is by Kwok-leong Tang.
+
+## Known data problems
+
+- About 6,000 rows (mostly POLYGON records, `hvd_90xxx` IDs) have longitude `0.00000`. On a map
+  they land in Africa. The skill's `--good-coords` flag drops them.
+- 251 rows end before they begin (e.g. `hvd_112536`).
+- `mv_pn_srch.parent_vn` is the earliest parent, not the parent in a given year. Use `part_of`
+  for a given year.

latest.json

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+{
+  "release": "20260325",
+  "sqlite_filename": "tgaz.db",
+  "format": "sqlite3",
+  "sha256": "f01afa80f65a470cfa6ebd557408e17b6dd5b9f45a9271a39c53d9735bf4ffc4",
+  "size_bytes": 238755840,
+  "archive_filename": "tgaz_20260325.zip",
+  "archive_sha256": "7e8745273dc2cdc7cff5c03be327a2ba4307133fc64259177469901abef94eb6",
+  "archive_size_bytes": 62156083,
+  "download_url": "https://huggingface.co/datasets/kltng/tgaz-sqlite/resolve/main/tgaz_20260325.zip"
+}

tgaz_20260325.zip

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+version https://git-lfs.github.com/spec/v1
+oid sha256:7e8745273dc2cdc7cff5c03be327a2ba4307133fc64259177469901abef94eb6
+size 62156083