GPWv4 Population Growth Preliminary Release, v1 (2000 – 2010)

The West Africa Coastal Vulnerability Mapping: GPW Version 4 Population Growth, Preliminary Release 1, 2000-2010, represents positive or negative growth in the number of persons per grid cell, and was calculated by subtracting an unreleased working version of the Gridded Population of the World (GPW), Version 4, year 2000 population count raster for the West Africa region from an unreleased working version of the GPWv4 year 2010 population count raster and cropping the result to within 200 kilometers of the coast. GPW provides globally consistent and spatially explicit human population information and data for use in research, policy making, and communications. This is a gridded (raster) data product that renders global population data at the scale and extent needed to demonstrate the spatial relationship of human populations and the environment globally. The gridded data set is constructed from national or subnational input units (usually administrative units) of varying resolutions. The native grid cell resolution of GPWv4 is 30 arc-second, or ~1 km at the equator.

西非沿海脆弱性制图：世界栅格人口数据集（Gridded Population of the World, GPW）第4版人口增长（初步版本1，2000-2010年），用于表征每个网格单元内的人口数量正负增长情况。该数据集的计算方法为：取未公开发布的GPWv4 2010年西非区域人口计数栅格（raster）数据集，减去同期未公开发布的GPWv4 2000年西非区域人口计数栅格数据集，随后将所得结果裁剪至沿海200公里范围以内。GPW可提供全球一致且空间显式的人口信息与数据，适用于科研、政策制定与传播等场景。本数据集属于栅格数据产品，可按照全球范围内展示人口与环境空间关系所需的尺度与范围呈现全球人口数据。该栅格数据集由不同分辨率的国家级与次国家级输入单元（通常为行政单元）构建而成。GPWv4的原生网格单元分辨率为30弧秒，在赤道处约合1公里。