Global Rural-Urban Mapping Project, Version 1 (GRUMPv1): Urban Extent Polygons, Revision 02

The Global Rural-Urban Mapping Project, Version 1 (GRUMPv1): Urban Extent Polygons, Revision 02 is an update to Revision 01, which included new settlements and represented the first time that SEDAC released polygons (in Esri shapefile format) with the settlement name (or name of the largest city in the case of multi-city agglomerations). The shapefile consists of polygons defined by the extent of the nighttime lights and approximated urban extents (circles) based on buffered settlement points. Revision 01 also included new urban extents identified from multiple sources and corrected georeferencing for some settlements (see separate documentation for Global Rural-Urban Mapping Project, Version 1 (GRUMPv1): Settlement Points, Revision 01 for the data and methods). Revision 01 was produced by the Columbia University Center for International Earth Science Information Network (CIESIN) in collaboration with CUNY Institute for Demographic Research (CIDR). Revision 02 was produced by CIESIN.

全球农村-城市映射项目，版本1（GRUMPv1）：城市范围多边形，修订版02是对修订版01的更新，其中纳入了新的居住地，并首次由SEDAC发布包含居住地名称（或对于多城市聚集区，为最大城市的名称）的多边形（以Esri形状文件格式）。该形状文件由夜间灯光的范围和基于缓冲居住点的大致城市范围（圆形）定义的多边形组成。修订版01还纳入了来自多个来源的新城市范围，并对某些居住地的地理参照进行了校正（有关数据和方法，请参阅全球农村-城市映射项目，版本1（GRUMPv1）：居住点，修订版01的单独文档）。修订版01由哥伦比亚大学国际地球科学信息网络中心（CIESIN）与纽约城市大学人口研究学院（CIDR）合作制作。修订版02由CIESIN制作。