Settlement patterns, population distribution and accessibility measures calculated for the 5 geographical regions of Africa.

Regions defined by the United Nations (http://unstats.un.org/unsd/methods/m49/m49regin.htm).2Clark and Evans aggregation index calculated based on settlement point patterns. A low R value (1) suggests that settlements are spatially ordered.3Average travel time to settlements of more than 50,000 people (hours).