The National Aeronautics and Space Administration’s Socioeconomic Data and Applications Center (SEDAC), which focuses on developing applications to integrate Earth science data into social sciences, has published estimates of net migration around the world every decade from 1970 to 2000. Since there is no globally consistent data on migration, SEDAC researchers relied on data from spatial population distributions and natural population growth—a region’s births minus deaths—to estimate net migration.
Image: Sara Prestianni.