# Data Dictionary - Global Cities Gazetteer (GeoNames, pop ≥ 1,000) - the universal place join key, cleaned

**Units:** stated per column in the descriptions below (this is a relational table; columns mix units).

| column | type | description |
|---|---|---|
| `geonameid` | int | GeoNames id (primary key) |
| `name` | str | Place name |
| `ascii_name` | str | ASCII place name |
| `country` | str | ISO 3166-1 alpha-2 country code |
| `admin1` | str | Admin-1 (state/region) code |
| `admin2` | str | Admin-2 (county/district) code |
| `population` | int | Population |
| `elevation_m` | float | Elevation (metres; GeoNames elevation, else DEM) |
| `timezone` | str | IANA timezone |
| `feature_code` | str | GeoNames feature code (PPL, PPLA, PPLC, …) |
| `latitude` | float | Latitude |
| `longitude` | float | Longitude |

*Source: GeoNames (geonames.org), CC-BY 4.0.*