GRID3 Sudan Settlement Extents, Version 01.01

Settlement extents are polygons representing areas where there is likely a human settlement based on the presence of buildings detected in satellite imagery. Settlement extents are not meant to represent the boundaries of an administrative unit or locality. A single settlement extent may be made up of multiple localities, especially in urban areas. Each settlement extent has an associated population estimate. Provided is information on the common operational boundary that the extent fully resides within along with their associated place codes (PCodes). The data are in geodatabase format and consist of a single-feature class. This data product contains all information contained in the previous “GRID3 Sudan Settlement Extents, Version 01” product, with updates. Updates in this version include: revised terms of use and license, Boundary and Place Codes for each settlement extent. This work has been undertaken as part of the Geo-Referenced Infrastructure and Demographic Data for Development (GRID3) programme. The programme is funded by the Bill & Melinda Gates Foundation and the United Kingdom's Foreign, Commonwealth & Development Office. It is implemented by the Flowminder Foundation, WorldPop at the University of Southampton, the United Nations Population Fund, and the Center for International Earth Science Information Network (CIESIN) at Columbia University. Keywords: Settlements, Hamlets, Built-up Areas (BUA), Small Settlement Areas (SSA)

居民地范围（Settlement extents）为多边形要素，基于卫星影像识别出的建筑物分布，表征存在人类聚居活动的区域。居民地范围并非用于表示行政区划单元或行政辖区的边界。单个居民地范围可包含多个聚居点，在城区中尤为普遍。每个居民地范围均附带对应的人口估算值。本数据集提供了各居民地范围完全归属的通用作业边界信息，以及对应的地点编码（Place Codes, PCodes）。本数据集采用地理数据库（geodatabase）格式，仅包含单一要素类。本数据产品包含此前发布的"GRID3 苏丹居民地范围 版本01"数据集的全部信息，并进行了更新优化。本版本的更新内容包括：修订后的使用条款与许可协议，以及各居民地范围的边界信息与地点编码。本项目为地理参考基础设施与发展人口统计数据（Geo-Referenced Infrastructure and Demographic Data for Development, GRID3）计划的一部分。该计划由比尔及梅琳达·盖茨基金会与英国外交、联邦及发展事务部资助，由弗洛明德基金会（Flowminder Foundation）、南安普顿大学WorldPop研究组、联合国人口基金以及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）联合实施。关键词：居民地、小村庄、建成区（Built-up Areas, BUA）、小型居民地区域（Small Settlement Areas, SSA）