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

The Gridded Population of the World, Version 3 (GPWv3): Population Count 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 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).

《世界人口网格，第三版（GPWv3）：人口计数网格》包含了对1990年、1995年和2000年人类人口数量的估计，这些估计值按照2.5弧分网格单元进行划分，并附有约2000年间的相关数据集。本数据集采用了一种比例分配网格算法，该算法综合了超过30万个国家和次国家级的行政单元，用于将人口值分配到网格单元中。人口计数网格包含每个网格单元内人数的估计值。网格数据以多种与GIS兼容的数据格式和地理范围（全球、洲际[不包括南极洲]和国家级别）提供。GPWv3由哥伦比亚大学国际地球科学信息网络中心（CIESIN）与热带农业国际中心（CIAT）合作编制。