Gridded Population of the World, Version 4 (GPWv4): Basic Demographic Characteristics, Revision 11

The Gridded Population of the World, Version 4 (GPWv4): Basic Demographic Characteristics, Revision 11 consists of estimates of human population by age and sex as counts (number of persons per pixel) and densities (number of persons per square kilometer), consistent with national censuses and population registers, for the year 2010. To estimate the male and female populations by age in 2010, the proportions of males and females in each 5-year age group from ages 0-4 to ages 85+ for the given census year were calculated. These proportions were then applied to the 2010 estimates of the total population to obtain 2010 estimates of male and female populations by age. In some cases, the spatial resolution of the age and sex proportions was coarser than the resolution of the total population estimates to which they were applied. The population density rasters were created by dividing the population count rasters by the land area raster. 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 data were aggregated to 2.5 arc-minute, 15 arc-minute, 30 arc-minute and 1 degree resolutions.

《世界网格人口，第四版（GPWv4）：基本人口统计学特征，修订11版》包含了根据年龄和性别对人类人口进行估计的数据，这些估计以人数（每像素人数）和密度（每平方公里人数）的形式呈现，并与各国的国情普查和人口登记数据保持一致，数据年份为2010年。为了估计2010年的男性和女性人口按年龄分布，计算了给定普查年从0-4岁到85岁以上的每个5岁年龄组的男性和女性比例。然后，将这些比例应用于2010年总人口估计，从而获得2010年按年龄划分的男性和女性人口估计。在某些情况下，年龄和性别比例的空间分辨率低于所应用的总人口估计的分辨率。通过将人口计数栅格与土地面积栅格相除，创建了人口密度栅格。数据文件以全球栅格形式生成，分辨率为30弧秒（赤道附近约为1公里）。为了实现全球处理速度的提升，并支持研究社群，30弧秒的数据被聚合至2.5分弧度、15分弧度、30分弧度和1度分辨率。