Global Rural-Urban Mapping Project, Version 1 (GRUMPv1): Population Count Grid

The Global Rural-Urban Mapping Project, Version 1 (GRUMPv1) consists of estimates of human population for the years 1990, 1995, and 2000 by 30 arc-second (1km) grid cells and associated data sets dated circa 2000. A proportional allocation gridding algorithm, utilizing more than 1,000,000 national and sub-national geographic units, is used to assign population values (counts, in persons) to grid cells. This data set is produced by the Columbia University Center for International Earth Science Information Network (CIESIN) in collaboration with the International Food Policy Research Institute (IFPRI), The World Bank, and Centro Internacional de Agricultura Tropical (CIAT).

全球城乡制图项目第一版（GRUMPv1）涵盖以30角秒（1千米）分辨率网格单元为统计单元的1990年、1995年及2000年人口估算数据，以及基准年代为2000年左右的配套数据集。本数据集采用比例分配网格化算法，依托超过100万个国家级与次国家级地理单元，将以个体人数为单位的人口统计计数赋值至各网格单元。该数据集由哥伦比亚大学国际地球科学信息网络中心（CIESIN）联合国际粮食政策研究所（IFPRI）、世界银行及国际热带农业中心（CIAT）共同编制发布。