GHS-POP R2019A - GHS population grid multitemporal (1975-1990-2000-2015) - OBSOLETE RELEASE

The spatial raster dataset depicts the distribution of population, expressed as the number of people per cell. Residential population estimates for target years 1975, 1990, 2000 and 2015 provided by CIESIN GPWv4.10 were disaggregated from census or administrative units to grid cells, informed by the distribution and density of built-up as mapped in the Global Human Settlement Layer (GHSL) global layer per corresponding epoch.

This dataset is an update of the product released in 2016. Major improvements are the following: use of better maps reporting built-up density (GHS-BUILT); use of more recents and detailed population estimates from GPWv4.10; better representation of settlements along coastlines; critical revision of census units declared as unpopulated; WGS-84 grids added.

本空间栅格数据集旨在刻画人口分布格局，以每个栅格单元的居住人口数作为量化表达形式。针对1975年、1990年、2000年与2015年四个目标年份的居住人口估算数据由CIESIN GPWv4.10提供，该数据已将普查单元或行政单元的人口统计结果分解至栅格单元，分解过程参考了对应时期全球人类住区图层（Global Human Settlement Layer, GHSL）所映射的建成区分布与密度信息。本数据集为2016年发布的同类产品的更新版本，主要改进点包括：其一，采用了精度更优的建成区密度制图数据（GHS-BUILT）；其二，引入了GPWv4.10提供的更具时效性与细节性的人口估算数据；其三，更精准地呈现了沿海区域的聚居点分布；其四，对被标记为无人居住的普查单元开展了审慎修订；其五，新增了WGS-84坐标系栅格数据。