Theresa McMenomy

Jun 25, 2024 | nature.com | Andrea Cattaneo |Serkan Girgin |Theresa McMenomy |Andrew Nelson

AbstractUrban centers are pivotal in shaping societies, yet a systematic global analysis of how countries are organized around multiple urban centers is lacking. We enhance understanding by delineating city–regions worldwide, classifying over 30,000 urban centers into four tiers—town, small, intermediate and large city—based on population size and mapping their catchment areas based on travel time, differentiating between primary and secondary city–regions.