Low Elevation Coastal Zone (LECZ) Urban-Rural Population and Land Area Estimates, Version 3

The Low Elevation Coastal Zone (LECZ) Urban-Rural Population and Land Area Estimates, Version 3 data set contains land areas with urban, quasi-urban, rural, and total populations (counts) within the LECZ for 234 countries and other recognized territories for the years 1990, 2000, and 2015. This data set updates initial estimates for the LECZ population by drawing on a newer collection of input data, and provides a range of estimates for at-risk population and land area. Constructing accurate estimates requires high-quality and methodologically consistent input data, and the LECZv3 evaluates multiple data sources for population totals, digital elevation model, and spatially-delimited urban classifications. Users can find the paper "Estimating Population and Urban Areas at Risk of Coastal Hazards, 1990-2015: How data choices matter" (MacManus, et al. 2021) in order to evaluate selected inputs for modeling Low Elevation Coastal Zones. According to the paper, the following are considered core data sets for the purposes of LECZv3 estimates: Multi-Error-Removed Improved-Terrain Digital Elevation Model (MERIT-DEM), Global Human Settlement (GHSL) Population Grid R2019 and Degree of Urbanization Settlement Model Grid R2019a v2, and the Gridded Population of the World, Version 4 (GPWv4), Revision 11. This data set is produced by the Columbia University Center for International Earth Science Information Network (CIESIN) and the City University of New York (CUNY) Institute for Demographic Research (CIDR).

《低海拔沿海地带（LECZ）城乡人口及土地面积估算数据集，版本3》包含了1990年、2000年和2015年LECZ范围内各国及其他认可领土的城乡、准城乡、乡村及总人口（计数）的土地面积。该数据集通过借鉴更新的输入数据集，对LECZ人口初始估算进行了更新，并提供了风险人口及土地面积的一系列估算。构建精确估算需依赖高质量且方法一致性的输入数据，LECZv3评估了多个数据源以获取人口总数、数字高程模型以及空间限定城乡分类。用户可通过查阅论文《1990-2015年沿海灾害风险人口和城市区域估算：数据选择的重要性》（MacManus等，2021年）来评估用于建模低海拔沿海地带的选定的输入数据。根据论文，以下数据集被认为是LECZv3估算的核心数据集：多误差去除改进地形数字高程模型（MERIT-DEM）、全球人类聚居（GHSL）人口网格R2019及城市化程度聚居模型网格R2019a v2，以及《世界人口网格》版本4（GPWv4），修订版11。本数据集由哥伦比亚大学国际地球科学信息网络中心（CIESIN）和纽约城市大学人口研究学院（CIDR）共同制作。