1. Carol Ludwig is wissenschaftliche Mitarbeiterin (Research Associate) in ‘Human Geography with a European focus’ in the Department of European Social Research at the Universität des Saarlandes (Saarland University), Campus, Geb. C5 3, 66123 Saarbrücken, Germany. She also leads the BMBF-funded project ‘Sozialkartographie’, as part of the ‘UrbanMetaMapping’ research consortium;
2. Olivier John Sykes is Senior Lecturer in European Spatial Planning and Discipline Lead for Planning in the Department of Geography and Planning at the University of Liverpool, 74 Bedford Street South, Liverpool, Merseyside L69 7ZQ, UK;
3. Greg Ludwig is Assistant Professor in the Northumbria University Faculty of Business and Law at Newcastle Business School, Northumbria University, City Campus East, Newcastle upon Tyne, NE1 8ST, UK;.