Skip to content

Data Structure

Geographic dataset

Stores the official polygon or multipolygon footprint of every municipality for a given reference year. Each feature carries: (a) the municipality's original national code and (b) the project's permanent internal identifier.

Dataset Snapshot

Item Description
Coverage 35 European countries
Time span 2014–2024
File format GeoPackage (.gpkg)
Projection ETRS89 / LAEA Europe — EPSG:30351
Units Metres
Encoding UTF-8
File name <country_iso>_mun_<yyyy>.gpkg2

Border changes dataset

This dataset flags whether a municipality underwent a boundary event in a particular year or a non-geographical one, classifies the event, tracks the full lifespan of every internal and official identifier, and groups related alterations under a common case_id.

Dataset Snapshot

Item Description
File name <country_iso>_change_log.csv
Primary key (munqog_code, year) — composite key; guarantees one record per municipality-year

<country_iso> is the two-letter ISO 3166-1 alpha-2 code, for example fr or de. Example: fr_change_log.csv.

Catalogues the legal acts that authorize each change, providing the act title, official reference URL, and a persistent URL to the downloadable document.

  1. ETRS89 / LAEA Europe (EPSG:3035) is the standard equal-area projection endorsed by Eurostat. It preserves surface-area comparability across the continent and aligns with the 1 km EU grid. ↩

  2. The country code is the two-letter ISO 3166-1 alpha-2 identifier (e.g., fr, de) listed in the Eurostat glossary of country codes. The year component is a four-digit calendar year. Combining these elements yields file names such as fr_mun_2014.gpkg. ↩