GHS Population Grids
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The Global Human Settlement Layer (GHSL) Population Grids are a set of global raster datasets that provide the distribution of population, expressed as the number of people per cell. Residential population estimates between 1975 and 2020 in 5 years intervals and projections to 2025 and 2030 derived from CIESIN GPWv4.11 were disaggregated from census or administrative units to grid cells, informed by the distribution, density, and classification 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 2022. Major improvements are the following: use of built-up volume maps (GHS-BUILT-V R2022A); use of more recent and detailed population estimates derived from GPWv4.11 integrating both UN World Population Prospects 2022 country population data and World Urbanisation Prospects 2018 data on Cities; revision of GPWv4.11 population growthrates by convergence to upper administrative level growthrates; systematic improvement of census coastlines; systematic revision of census units declared as unpopulated; integration of non-residential built-up volume information (GHS-BUILT-V_NRES R2023A); spatial resolution of 100m Mollweide (and 3 arcseconds in WGS84); projections to 2030. The GHSL population grids are produced by the Joint Research Centre (JRC) of the European Commission.
全球人类居住图层（Global Human Settlement Layer, GHSL）人口栅格数据集为一套全球栅格数据集，用于呈现人口空间分布，以单个栅格单元内的居住人口数作为统计表达形式。本数据集以CIESIN GPWv4.11为基础数据源，获取了1975年至2020年每5年间隔的居住人口估算数据，并推算至2025年与2030年；通过匹配对应时期全球人类居住图层（GHSL）中绘制的建成区分布、密度与分类信息，将原始人口数据从人口普查单元或行政单元空间降尺度至栅格单元。本数据集为2022年发布的同系列产品的更新版本，主要改进如下：采用建成区体积地图（GHS-BUILT-V R2022A）；使用基于GPWv4.11的最新详细人口估算数据，该数据整合了联合国《世界人口展望2022》的国家人口统计数据与《世界城市化展望2018》的城市相关统计数据；通过向更高行政层级的人口增长率收敛，修正了GPWv4.11原有的人口增长率参数；系统性优化了人口普查海岸线数据；系统性修订了被标记为无人居住的普查单元；整合了非居住用建成区体积信息（GHS-BUILT-V_NRES R2023A）；空间分辨率采用100米莫尔韦德投影（WGS84坐标系下为3角秒）；新增至2030年的人口推算数据。全球人类居住图层人口栅格数据集由欧盟委员会联合研究中心（Joint Research Centre, JRC）制作。
