Download 77 province and 928 district reference boundaries in GeoJSON or a real Shapefile ZIP. Both formats contain the same simplified COD-AB geometry and PCODE identifiers, with English and Thai names. Choose GeoJSON for web tools or Shapefile for a GIS workflow; neither is cadastral evidence.
Same simplified reference geometry in both formats. Source validity is a historical date, not confirmation of present administrative or cadastral boundaries. No account or API key is required.
| Reference level | GeoJSON | Shapefile ZIP | Integrity and source |
|---|---|---|---|
| 77 provinces | Download GeoJSON | Download Shapefile ZIP 172,980 bytes | Download manifest with SHA-256 and all PCODEs |
| 928 districts | Download GeoJSON | Download Shapefile ZIP 97,920 bytes | Download manifest with SHA-256 and all PCODEs |
In QGIS: add the GeoJSON as a vector layer, or extract the ZIP and add the .shp. Keep .shx, .dbf, .prj and .cpg beside it. Confirm EPSG:4326, UTF-8 Thai names and text identifiers. Shapefile field names are id, en, th, plus parent for districts. The archive includes README, licence, source provenance and a manifest; redistribution needs attribution and notice of the simplification.
Source valid on / resource modified / recorded source check: 2022-01-22 / 2026-01-26 / 2026-07-27
HDX / UNOCHA COD-AB contributors; RTSD source data · CC BY 3.0 IGO
| Input or condition | How to interpret it |
|---|---|
| GeoJSON | A single UTF-8 file with geometry and attributes; longitude precedes latitude. Convenient for JavaScript and web analysis. |
| Shapefile ZIP | A genuine .shp geometry file plus .shx index, .dbf attributes, .prj projection and .cpg encoding. Keep them together; renaming JSON to .shp is not conversion. |
| Version and precision | The source is valid on 2022-01-22; resource modified 2026-01-26 and recorded source verification 2026-07-27. Province coordinates use 5 decimal places and district coordinates 4; these do not establish survey accuracy or current legal boundaries. |
Code illustrates a review procedure, not an observed result. Replace illustrative inputs with verified records; missing values deliberately remain unknown.
# Convert the downloaded simplified WGS84 GeoJSON locally:
mapshaper th-adm1.json -proj wgs84 -o provinces.shp format=shapefile encoding=utf8
# Keep .shp, .shx, .dbf, .prj and .cpg together.
# Join on id (PCODE), never on a translated name.An attributed regional reference layer for map display and PCODE joins. For cadastral, engineering or legal boundary decisions, obtain authoritative records at the required scale; conversion and coordinate precision do not remove the source geometry simplification.