2001-2020年西非国家每年无透表面数据:加纳,多哥,贝宁和尼日利亚
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Updated: Jun 20, 2025

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In Situ Soil Moisture Sensors in Undisturbed Soils
Published on: November 18, 2022
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Andrews Korah1, Michael C Wimberly2
1Department of Geography and Environmental Sustainability, University of Oklahoma, Norman, OK, 73019, USA. andrews.korah@ou.edu.
Scientific data
|July 18, 2024
概括
研究人员从2001年到2020年为加纳,多哥,贝宁和尼日利亚创建了详细的不透气表面地图. 这一新数据集的准确性高于全球产品,有助于西非的城市规划和环境研究.
科学领域:
- 遥感 遥感 遥感 遥感
- 地理信息系统 (GIS) 是指地理信息系统.
- 环境科学 环境科学
背景情况:
- 不透的表面数据对于城市研究和规划至关重要.
- 现有的全球和本地数据集对非洲缺乏足够的区域覆盖.
- 西非地区需要高分辨率的,特定于区域的不透水表面数据.
研究的目的:
- 为加纳,多哥,贝宁和尼日利亚从2001年到2020年每年生成30m分辨率不透的覆盖数据.
- 提供区域校准的数据集,以支持城市扩张研究.
- 提高西非无透地表绘图的精度和空间细节.
主要方法:
- 使用Landsat的档案来获取数据.
- 采用随机森林分类,具有11个光谱指数,用于无透覆盖的预测.
- 使用LandTrendr算法应用像素级的时间细分来提高准确性.
主要成果:
- 实现了高预测准确度,r2=0.81,低平均误差 (-0.03),和RMSE=9.93%.
- 分类发达地区 (>20%不透气) 总准确率为93%.
- 与全球数据集相比,生成的地图显示出更高的准确性和更好地捕获的发达地区.
结论:
- 本研究为西非提供了第一个区域校准的30米分辨率无透表面数据集.
- 该数据集为研究城市增长动态和告知规划决策提供了宝贵的资源.
- 改进的准确性和区域特异性增强了无表面数据在该地区环境研究中的实用性.
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