Administrative boundary data

Find the boundary data you need.

Browse administrative boundaries for mapping, research, and web projects. Every dataset includes its update date, source, and usage license.

Available datasets

Choose a region to review the data and download the file.

Japan Municipality Boundaries

City, ward, town and village (市区町村) boundaries, including designated-city wards.

Download GeoJSON 9.61 MiB · 1905 records
Updated
Records
1905
File size
9.61 MiB
Data source
国土交通省
Usage license
国土数値情報 利用約款（CC BY 4.0 相当）

Attribution「国土数値情報（行政区域データ）」（国土交通省）（https://nlftp.mlit.go.jp/ksj/gml/datalist/KsjTmplt-N03-2026.html）を加工して作成。

Technical details and integration example
Dataset ID
jp-municipalities
Release ID
2026-08-04.1
CRS
EPSG:4326
Coverage
122.93382, 24.04588, 153.98607, 45.55724
SHA-256
f1ddca348115553297ada27271543e7515fde8d80d279931a83c2c1e66b91924

JavaScript integration

const response = await fetch('/datasets/jp-municipalities/releases/v1/2026-08-04.1/data.geojson');
const boundaries = await response.json();

Japan Municipality Boundaries boundary preview

Pan or zoom the map, then select an area to view its name.

Download GeoJSON

Japan Prefecture Boundaries

Prefecture (都道府県) boundaries.

Download GeoJSON 6.52 MiB · 47 records
Updated
Records
47
File size
6.52 MiB
Data source
国土交通省
Usage license
国土数値情報 利用約款（CC BY 4.0 相当）

Attribution「国土数値情報（行政区域データ）」（国土交通省）（https://nlftp.mlit.go.jp/ksj/gml/datalist/KsjTmplt-N03-2026.html）を加工して作成。

Technical details and integration example
Dataset ID
jp-prefectures
Release ID
2026-08-04.1
CRS
EPSG:4326
Coverage
122.93382, 24.04588, 153.98607, 45.55724
SHA-256
c823cde901bb077cd3f861632bbcdd3676283d9e6f30c76b0d0fab330ebf157e

JavaScript integration

const response = await fetch('/datasets/jp-prefectures/releases/v1/2026-08-04.1/data.geojson');
const boundaries = await response.json();

Japan Prefecture Boundaries boundary preview

Pan or zoom the map, then select an area to view its name.

Download GeoJSON

Taiwan County/City Boundaries

County and municipality (直轄市／縣／市) boundaries.

Download GeoJSON 2.55 MiB · 22 records
Updated
Records
22
File size
2.55 MiB
Data source
內政部國土測繪中心
Usage license
政府資料開放授權條款－第1版

Attribution內政部國土測繪中心 2025 直轄市、縣（市）界線（1140318）；此開放資料依政府資料開放授權條款第1版進行公眾釋出。

Technical details and integration example
Dataset ID
tw-counties
Release ID
2026-08-07.1
CRS
EPSG:4326
Coverage
114.359295, 10.371348, 124.561154, 26.385275
SHA-256
25a1ef2fcd0c09f5dabe070fbd64490e0084cba8795c2724a9be335e2d6a183e

JavaScript integration

const response = await fetch('/datasets/tw-counties/releases/v1/2026-08-07.1/data.geojson');
const boundaries = await response.json();

Taiwan County/City Boundaries boundary preview

Pan or zoom the map, then select an area to view its name.

Download GeoJSON

Taiwan Township Boundaries

Township, county-administered city and district boundaries.

Download GeoJSON 4.70 MiB · 368 records
Updated
Records
368
File size
4.70 MiB
Data source
內政部國土測繪中心
Usage license
政府資料開放授權條款－第1版

Attribution內政部國土測繪中心 2025 鄉鎮市區界線（1140318）；此開放資料依政府資料開放授權條款第1版進行公眾釋出。

Technical details and integration example
Dataset ID
tw-townships
Release ID
2026-07-04.1
CRS
EPSG:4326
Coverage
114.3592898390001, 10.371347663000051, 124.5611539250001, 26.38527526200005
SHA-256
4ab5da8297a75c3e3fd2cb272642693a91f04299a739897dffc8d7ae029d5196

JavaScript integration

const response = await fetch('/datasets/tw-townships/releases/v1/2026-07-04.1/data.geojson');
const boundaries = await response.json();

Taiwan Township Boundaries boundary preview

Pan or zoom the map, then select an area to view its name.

Download GeoJSON

UK Local Authority District Boundaries

May 2025 United Kingdom Local Authority District boundaries, ultra generalised and clipped.

Download GeoJSON 4.90 MiB · 361 records
Updated
Records
361
File size
4.90 MiB
Data source
Office for National Statistics
Usage license
Open Government Licence v3.0

AttributionSource: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2025.

Technical details and integration example
Dataset ID
uk-local-authority-districts
Release ID
2026-07-10.1
CRS
EPSG:4326
Coverage
-8.64999583330431, 49.882346492852, 1.76357118981522, 60.8608667553459
SHA-256
50e4da9f80df1c8a2181488b80126ecd53429138c12bf3bdaa74ff8bf647a4b1

JavaScript integration

const response = await fetch('/datasets/uk-local-authority-districts/releases/v1/2026-07-10.1/data.geojson');
const boundaries = await response.json();

UK Local Authority District Boundaries boundary preview

Pan or zoom the map, then select an area to view its name.

Download GeoJSON