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.

《世界人口网格版》第四版（GPWv4）：针对联合国世界人口前景（UN WPP）国家总数2015年修订版的调整人口计数，修订版11包含符合国家人口普查和人口登记数据相对空间分布的常住人口估计（每像素的人数），并经调整以与联合国世界人口前景（UN WPP）2000年、2005年、2010年、2015年和2020年的国家总数修订版相吻合。采用了一种比例分配网格算法，该算法利用约1350万个国家和次国家级行政单元，将人口计数分配至30弧秒的网格单元。数据文件以30弧秒（赤道附近约为1公里）的分辨率作为全球栅格数据生成。为了加速全球处理，并支持研究群体，30弧秒调整后的计数数据被聚合至2.5弧分、15弧分、30弧分和1度分辨率。