Gridded Population of the World, Version 4 (GPWv4): Population Count Adjusted to Match 2015 Revision of UN WPP Country Totals, Revision 11

The Gridded Population of the World, Version 4 (GPWv4): Population Count Adjusted to Match 2015 Revision of UN WPP Country Totals, Revision 11 consists of estimates of human population (number of persons per pixel) consistent with national censuses and population registers with respect to relative spatial distribution, but adjusted to match the 2015 Revision of the United Nation's World Population Prospects (UN WPP) country totals 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 data files were produced as global rasters at 30 arc-second (~1 km at the equator) resolution. To enable faster global processing, and in support of research communities, the 30 arc-second adjusted count data were aggregated to 2.5 arc-minute, 15 arc-minute, 30 arc-minute and 1 degree resolutions.世界栅格人口第四版（Gridded Population of the World, Version 4，GPWv4）：经调整以匹配联合国世界人口展望（United Nations World Population Prospects，UN WPP）2015修订版国家总人口的人口计数数据集，第11次修订版。该数据集包含与全国人口普查及人口登记数据在相对空间分布上一致的人口数量估算值（单像素人数），但已调整至匹配2000、2005、2010、2015及2020年的UN WPP 2015修订版国家总人口数据。本数据集采用比例分配栅格化算法，利用约1350万个国家级与次级国家级行政单元，将人口计数分配至30角秒栅格单元。数据文件以全球栅格形式产出，分辨率为30角秒（赤道处约1公里）。为支持全球快速处理并服务科研社区，研究团队已将30角秒分辨率的调整后人口计数数据聚合为2.5角分、15角分、30角分及1度分辨率的数据。