- Cross-border commuters from Wallonia to France at place of residence (Arrondissements): 2007-2017 - Territorial entities: Arrondissements - Commuting data sources: INAMI 2018. Calculations: OIE/IBA 2018 - Geodata sources: NGI-Belgium 2017. Harmonization: SIG-GR / GIS-GR 2018

- Number of nights spent and nights/population ratio in 2016 - Territorial level: NUTS 2 - Sources: Eurostat - European Commission 2016, EuroGeographics 2013. Harmonization: Lepur - ULiège

- Cross-border commuters from France to Saarland at place of work (Kreise): 2007-2017 - Territorial entities: Landkreise - Commuting data sources: Bundesagentur für Arbeit 2018. Calculations: OIE/IBA 2018 - Geodata sources: GeoBasis-DE / BKG 2017. Harmonization: SIG-GR / GIS-GR 2018

Quality of the intraregional rail connections (2017) based on the linear distance speed of the fastest connection between the major centres of the Greater Region - Sources: FAU, Deutsche Bahn 2017

- Ecological status/potential of surface water bodies - Data sources: SPW-DGO3-DEE 2013; MDDI, Administration de la gestion de l'eau 2015; MUEFF 2015; GDI-SL 2015; Agences de l'eau, RM-SN-RMC 2015. Harmonization: IGEAT 2018

- Number of under 20-year-olds in 2016 - Share of under 20-year-olds in the total population 2016 (Lorraine: 2014, Luxembourg: 2017) - Territorial entities: arrondissements (Wallonie), cantons (Lorraine, Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: INSEE Grand Est, Statistisches Landesamt Rheinland-Pfalz, Statistisches Amt Saarland, STATEC, IWEPS. Calculations: LISER 2018 - Geodata sources: ACT Luxembourg 2017, IGN France 2017, GeoBasis-DE / BKG 2017, NGI-Belgium 2017. Harmonization: SIG-GR / GIS-GR 2018

- Airport passengers 2017 - Trimodal hubs rail-road-water - Ports TEN-T - Airport passengers 2017 - High-speed railway lines - Railway lines TEN-T - Main roads (core network TEN-T) - Secondary roads (comprehensive network TEN-T) - Navigable waterways - Maritime links - Driving times to major centres at peak times in minutes (isochrones) - Sources: GISCO 2017; SIG-GR / GIS-GR 2017; European Environment Agency 2012; OSM 2017; European Commission 2017; EUROSTAT 2018. Harmonization: CREAT-UCL 2018.

- Airport passengers 2017 - Trimodal hubs rail-road-water - Ports TEN-T Airport passengers 2017 - High-speed railway lines - Railway lines TEN-T - Main roads (core network TEN-T - Secondary roads (comprehensive network TEN-T) - Navigable waterways - Maritime links - Sources: GISCO 2017; SIG-GR / GIS-GR 2017; European Environment Agency - 2012; OSM-2017; European Commission 2017; EUROSTAT 2018. Harmonization: CREAT-UCL 2018

- Population density 2017 (inhabitants per km²), Lorraine: 2015 - Territorial entities: arrondissements (Wallonie), zones d'emploi (Lorraine), cantons (Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: INSEE Grand Est; DG Statistique - Statistics Belgium; Eurostat; STATEC. Harmonization: IBA / OIE 2018 - Geodata sources: GeoBasis-DE / BKG 2017; IGN France 2017; NGI-Belgium 2017; ACT Luxembourg 2017. Harmonization: SIG-GR / GIS-GR 2018

- Cross-border commuters from Rhineland-Palatinate to Luxembourg at place of residence (Kreise): 2009-2017 - Territorial entities: Kreise - Commuting data sources: IGSS 2018. Calculations: OIE/IBA 2018 - Geodata sources: GeoBasis-DE / BKG 2017. Harmonization: SIG-GR / GIS-GR 2018