Liu Zhitao, Huang Sheng, Fang Chuanglin, Guan Luotong, Liu Menghang
Key Laboratory of Regional Sustainable Development Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.
School of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
Sci Data. 2024 Dec 18;11(1):1359. doi: 10.1038/s41597-024-04195-y.
Accurate mapping of global urban and rural settlements is crucial for understanding their distinct expansion patterns and ecological impacts. However, existing global datasets focus mainly on urban settlements and ignore the delineation of rural settlements. Therefore, this study proposed a framework for delineating between urban and rural settlements based on dynamic thresholds defined by area and light brightness and constructed the first global 100-meter resolution urban and rural settlements dataset (GURS) spanning from 2000 to 2020, integrating GHS-BUILT-S R2023A, NPP-VIIRS-like nighttime light, and OpenStreetMap data. An accuracy assessment of 44,474 independent samples showed that GURS achieved an overall accuracy of 91.22% with a kappa coefficient of 0.85, outperforming nine multi-scale reference datasets in delineating global urban and rural settlements. GURS offers deep insights into the dynamics of global settlements, facilitating urban-rural comparative studies on socio-economic characteristics, environmental impacts, and governance modes, thereby enhancing the sustainable management of settlements.
准确绘制全球城乡住区地图对于了解其独特的扩张模式和生态影响至关重要。然而,现有的全球数据集主要关注城市住区,而忽略了农村住区的划定。因此,本研究提出了一个基于面积和光照亮度定义的动态阈值来区分城乡住区的框架,并构建了第一个覆盖2000年至2020年的全球100米分辨率城乡住区数据集(GURS),整合了GHS-BUILT-S R2023A、类似NPP-VIIRS的夜间灯光和OpenStreetMap数据。对44474个独立样本的精度评估表明,GURS的总体精度达到91.22%,kappa系数为0.85,在划定全球城乡住区方面优于九个多尺度参考数据集。GURS为全球住区动态提供了深刻见解,有助于开展关于社会经济特征、环境影响和治理模式的城乡比较研究,从而加强住区的可持续管理。