... Years of estimation Number of input units Modeled inputs GRUMP v1 Global CIESIN, IFPRI, World Bank, and CIAT 3000 DETERMINING GLOBAL POPULATION DISTRIBUTION Table Note: A dot indicates ... v3 1995 19 94 19 000 None 2000 1990, 1995 127 000 None 20 04 1990, 1995, 2000 376 500 None 20 04 2015 376 500 None Spatial extent Global Global Global Global Authors Tobler et al CIESIN, IFPRI, ... Commission), Global Environment Monitoring Unit, TP 44 0, Via Enrico Fermi 1, I-21020 Ispra (VA), Italy Abstract Introduction 1.1 Rendering Population on a Global...