GRID3 Ethiopia 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 Ethiopia 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)

居民点范围（Settlement extents）为多边形要素，其基于卫星影像中检测到的建筑物分布，表征存在人类聚居活动的区域。该类居民点范围并非用于表示行政单元或行政属地的边界。单个居民点范围可包含多个属地，在城市区域中尤为常见。每个居民点范围均关联有对应的人口估算值。本数据集还提供了居民点范围完全归属的通用作业边界信息，以及与之关联的地点编码（Place Codes, PCodes）。本数据采用地理数据库（geodatabase）格式存储，仅包含单要素类。本数据产品包含此前发布的"GRID3 埃塞俄比亚居民点范围 版本01"（GRID3 Ethiopia Settlement Extents, Version 01）的全部信息，并新增了多项更新内容。本版本的更新内容包括：修订后的使用条款与许可协议，以及每个居民点范围对应的边界与地点编码。本数据集的制作隶属于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。该计划由比尔及梅琳达·盖茨基金会与英国外交、联邦及发展办公室资助，其执行方包括弗洛明德基金会（Flowminder Foundation）、南安普顿大学世界人口研究项目（WorldPop）、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）。关键词：居民点、小村庄、建成区（Built-up Areas, BUA）、小型居民点区（Small Settlement Areas, SSA）