Gridded Population of the World, Version 3 (GPWv3): Population Density Grid

The Gridded Population of the World, Version 3 (GPWv3): Population Density Grid consists of estimates of human population for the years 1990, 1995, and 2000 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 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).

《世界人口网格，版本3（GPWv3）：人口密度网格》包含了对1990年、1995年和2000年全球人类人口的估计，这些估计数据基于2.5弧分网格单元，并附带约2000年的相关数据集。本数据集采用了一种比例分配网格算法，该算法利用超过30万个国家和次国家级行政单元，将人口值分配到网格单元中。人口密度网格是通过将人口计数网格与土地面积网格相除而得，以每平方公里人数表示。这些网格以多种地理信息系统兼容的数据格式和地理范围（全球、洲际[不包括南极洲]和国家层面）提供。GPWv3由哥伦比亚大学国际地球科学信息网络中心（CIESIN）与热带国际农业研究中心（CIAT）合作制作。