500-m/annual GDI Dataset in the Arid and Semi-arid Region of Northwest China (2001-2023)
CAI Diwen1ZHANG Yingqian1LUO Wenhui1LIANG Jiahong1AI Zeying1DONG Zhaoji1SHANG Zhihai*1
1 School of Geographical Sciences，Lingnan Normal University，Zhanjiang 524048，China
DOI:10.3974/geodb.2025.11.04.V1
Published:Nov. 2025
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Key Words：
Grassland degradation,degree of degradation,natural baseline,Arid and Semi-arid Region of Northwest China
Abstract：
The authors developed a yearly dataset of the Grassland Degradation Degree Index (GDI) in the arid and semi-arid region of Northwest China. This index was derived by comparing the actual primary productivity of grassland (MODIS-NPP) with the natural baseline values. The dataset includes: (1) annual spatial GDI with 500-m resolution from 2001 to 2023; (2) annual average GDI from 2001 to 2023. The GDI has a value range of 0-100. A higher value indicates a higher degree of grassland degradation. The dataset is archived in .tif and .xlsx formats, and consists of 117 data files with a data size of 270 MB (compressed into one file with 228 MB).
Foundation Item：
National Natural Science Foundation of China (42301003); Lingnan Normal University (ZL22032)
Data Citation：
CAI Diwen, ZHANG Yingqian, LUO Wenhui, LIANG Jiahong, AI Zeying, DONG Zhaoji, SHANG Zhihai*. 500-m/annual GDI Dataset in the Arid and Semi-arid Region of Northwest China (2001-2023)[J/DB/OL]. Digital Journal of Global Change Data Repository, 2025. https://doi.org/10.3974/geodb.2025.11.04.V1.
References：
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Data Product:
| ID |
Data Name |
Data Size |
Operation |
| 1 |
NW_GDI.rar |
234326.11KB |
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