Largest world cities (100) urban footprint. Data from United Nations World Urbanization Prospects report (2011 revision) visible at : http://empreinte-urbaine.eu/viz/worldcities-urbanfootprint/
This dataviz is designed and developed by empreinte urbaine. This work is released under Creative common Licence, Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0).