| get_population | Get population data for a specific release |
| get_psgc | Get PSGC data for a specific release |
| latest_release | The most recent bundled PSGC release |
| list_releases | List available PSGC releases |
| map_psgc | Map PSGC codes to a target release |
| psgc_info | Get metadata for one or more PSGC codes |