The Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11 consists of estimates of human population density (number of persons per square kilometer) based on counts consistent with national censuses and population registers, for the years 2000, 2005, 2010, 2015, and 2020. A proportional allocation gridding algorithm, utilizing approximately 13.5 million national and sub-national administrative units, was used to assign population counts to 30 arc-second grid cells.
The population was compiled from available census reports and validated using other available datasets. For each country, population counts from the finest resolution was trended to 2010 using a country-specific annual growth rate assumptions. Underlying vector geometry comes from regional sources, primarily SPC.
Primary Data Source(s): PopGIS, Federated States of Micronesia Division of Statistics
Secondary Data Source(s): None
Geographical Resolutions Available (with count):
1. State (4)
2. Municipality (421)
3. Electoral District (373)