Gridded Population of the World, Version 3 (GPWv3): National Administrative Boundaries

The Gridded Population of the World, Version 3 (GPWv3): National Administrative Boundaries are derived from the land area grid to show the outlines of pixels (cells) that contain administrative units in GPWv3 on a per-country/territory basis. The National Boundaries data are derived from the pixels as polygons and thus have rectilinear boundaries at large scale. Note that the polygons that outline the countries and territories are not official representations; rather, they represent the area covered by the statistical data as provided. The national/territorial boundaries are designed for cartographic use with the GPWv3 population raster data sets. GPWv3 is produced by the Columbia University Center for International Earth Science Information Network (CIESIN) in collaboration with Centro Internacional de Agricultura Tropical (CIAT).
To provide a quantitative measure of the input resolution of administrative units used for GPWv3.

全球栅格人口数据集第3版（Gridded Population of the World, Version 3，以下简称GPWv3）：国家行政边界数据集源自陆地区域栅格，用于按国家/地区维度，标注GPWv3中包含行政单元的像素（pixel）与栅格单元（cell）的轮廓。该国家边界数据由栅格像素转换为多边形矢量得到，因此在大比例尺下呈现为直线边界。需注意，这些国家和地区的多边形轮廓并非官方边界表述，仅代表所提供的统计数据所覆盖的区域。此国家/地区边界数据集专为配合GPWv3人口栅格数据集开展制图应用而设计。GPWv3由哥伦比亚大学国际地球科学信息网络中心（Center for International Earth Science Information Network，CIESIN）与国际热带农业中心（Centro Internacional de Agricultura Tropical，CIAT）合作制作。
本数据集旨在量化GPWv3所采用的行政单元的输入分辨率。