Figure 3
The three population and mobility data layers in GLEaM. The population layer consists of demographic data at a resolution of 15 × 15 minutes of arc, organized in geo-referenced census areas obtained with a Voronoi tessellation procedure around transportation hubs. The short-range mobility layer covers commuting patterns between adjacent subpopulations based on data collected and analyzed from more than 30 countries on 5 continents across the world, modeled with a time-scale separation approach that defines the effective force of infections in connected subpopulations. The long-range mobility layer covers the air travel flow, measured in available seats between worldwide airport pairs connected by direct flights.