Gridded Population of the World, Version 3 (GPWv3): Population Count Grid, Future Estimates

The Gridded Population of the World, Version 3 (GPWv3) Future Estimates consists of estimates of human population for the years 2005, 2010, and 2015 by 2.5 arc-minute grid cells and associated data sets dated circa 2000. A proportional allocation gridding algorithm, utilizing more than 300,000 national and sub-national administrative units, is used to assign population values to grid cells. The population counts that the grids are derived from are extrapolated based on a combination of subnational growth rates from census dates and national growth rates from United Nations statistics. All of the grids have been adjusted to match United Nations national level population estimates. The population count grids contain estimates of the number of persons per grid cell. The grids are available in various GIS-compatible data formats and geographic extents (global, continent [Antarctica not included], and country levels). GPWv3 is produced by the Columbia University Center for International Earth Science Information Network (CIESIN) in collaboration with Centro Internacional de Agricultura Tropical (CIAT).世界栅格人口数据集第3版（Gridded Population of the World, Version 3，GPWv3）未来预估数据集，包含2005年、2010年、2015年三个年份的人口预估数据，空间分辨率为2.5弧分栅格单元，同时配套约2000年左右的关联数据集。该数据集采用比例分配栅格化算法，依托超过30万个国家级与次国家级行政单元，将人口数值赋值至对应栅格单元。栅格所基于的人口计数数据，是结合普查年份的次国家级人口增长率与联合国统计的国家级人口增长率进行外推得到的。所有栅格数据均已完成校准，以匹配联合国的国家级人口预估数据。人口计数栅格包含每个栅格单元的人口数量预估值。该数据集提供多种兼容地理信息系统（GIS）的数据格式与地理覆盖范围，涵盖全球、各大洲（不含南极洲）以及国家级尺度。GPWv3由哥伦比亚大学国际地球科学信息网络中心（CIESIN）与国际热带农业中心（CIAT）合作研发。