80.7% of the Earth's population lives within one hour of a city, but accessibility varies by wealth. In high-income countries 90.7% of the population lives within an hour of a city compared to just 50.9% in low-income countries*.
This new global map of accessibility has been produced by University of Oxford, based on the previous map by Nelson et al, with support from the JRC through the RoadLess Forest project. For more information on this project and/or to download the data, go to http://www.map.ox.ac.uk/accessibility_to_cities/.
Citation: D.J. Weiss, A. Nelson, H.S. Gibson, W. Temperley, S. Peedell, A. Lieber, M. Hancher, E. Poyart, S. Belchior, N. Fullman, B. Mappin, U. Dalrymple, J. Rozier, T.C.D. Lucas, R.E. Howes, L.S. Tusting, S.Y. Kang, E. Cameron, D. Bisanzio, K.E. Battle, S. Bhatt, and P.W. Gething. A global map of travel time to cities to assess inequalities in accessibility in 2015. (2018). Nature. doi:10.1038/nature25181
* Country classification are from the World Bank and are based on the gross domestic product.