Global Human Settlement Layer: Population and Built-Up Estimates, and Degree of Urbanization Settlement Model Grid

The Global Human Settlement Layer: Population and Built-Up Estimates, and Degree of Urbanization Settlement Model Grid data set provides gridded data on human population (GHS-POP), built-up area (GHS-BUILT), and degree of urbanization (GHS-SMOD) across four time periods: 1975, 1990, 2000, and 2014 (BUILT) or 2015 (POP, SMOD). GHS-BUILT describes the percent built-up area for each 30 arc-second grid cell (approximately 1 km at the equator) based on Landsat imagery from each of the four time periods. GHS-POP consists of census data from the 2010 round of global census from Gridded Population of the World, Version 4, Revision 10 (GPWv4.10) spatially-allocated within census Units based on the percent built-up areas from GHS-BUILT. GHS-SMOD uses GHS-BUILT and GHS-POP in order to develop a standardized classification of degree of urbanization grid. The original data from the Joint Research Centre of the European Commission (JRC-EC) has been combined into a single data package in GeoTIFF format and reprojected from Mollweide Equal Area into WGS84 at 9 arc-second and 30 arc-second horizontal resolutions in order to support integration with a variety of global raster data sets.

全球人类居住地层：人口与建成区估计及城市化程度模型网格数据集，提供了关于人类人口（GHS-POP）、建成区（GHS-BUILT）及城市化程度（GHS-SMOD）的栅格数据，覆盖四个时间节点：1975年、1990年、2000年和2014年（BUILT）或2015年（POP、SMOD）。GHS-BUILT描述了每个30弧秒网格单元（约在赤道处为1公里）的建成区百分比，数据基于四个时间段的Landsat影像。GHS-POP由世界人口网格数据（GPWv4.10）第四次全球人口普查数据构成，基于GHS-BUILT中的建成区百分比，在普查单元中进行空间分配。GHS-SMOD利用GHS-BUILT和GHS-POP，以构建城市化程度网格的标准化分类。原始数据由欧洲委员会联合研究中心（JRC-EC）提供，已整合为一个单一数据包，并以GeoTIFF格式呈现，从莫勒韦德等面积投影重新投影至WGS84坐标系，水平分辨率为9弧秒和30弧秒，以便支持与多种全球栅格数据集的集成。