Gridded Population of the World, Version 3 (GPWv3): Population Density 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. 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 future estimate population values 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 density grids are derived by dividing the population count grids by the land area grid and represent persons per square kilometer. 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).

世界栅格人口数据第三版（GPWv3）未来预估数据集，涵盖2005年、2010年及2015年以2.5弧分为分辨率的栅格单元人口预估数据。本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，将人口数值赋值至各栅格单元。未来预估的人口数值基于普查时点的次国家级人口增长率与联合国统计口径下的国家级人口增长率的组合开展外推。所有栅格数据均已完成校准，以匹配联合国发布的国家级人口预估数据。人口密度栅格由人口总量栅格除以陆地区域栅格计算得出，单位为每平方公里人口数。本数据集提供多种地理信息系统（GIS）兼容的数据格式，并支持不同地理尺度范围：全球尺度、大洲尺度（不含南极洲）以及国家尺度。GPWv3由哥伦比亚大学国际地球科学信息网络中心（CIESIN）与热带农业国际中心（CIAT）联合制作。