格尔木-那曲、共和-玉树高等级公路沿线10km缓冲区植被覆盖度（2022）

本数据为格尔木-那曲高等级公路10km缓冲区植被覆盖度，采用基于归一化植被指数（NDVI）像元二分模型，根据土地利用类型确定纯植被像元值和纯裸土像元值，实现植被覆盖度计算，产品去除湖泊、河流、冰川/永久积雪等区域。其中，NDVI数据来源于国家青藏高原科学数据中心中国区域250米归一化植被指数数据集（2000-2022）产品。通过时空变化趋势分析检验法分析，该数据集符合时间变化趋势和空间变化趋势。植被覆盖度单位为0.01％。该数据集能够为区域生态质量评价、重要生态空间调查评估等工作提供数据参考。

This dataset presents vegetation coverage within the 10-kilometer buffer zone of the Golmud-Nagqu high-grade highway. Vegetation coverage was calculated using the dimidiate pixel model based on the Normalized Difference Vegetation Index (NDVI), where the values of pure vegetation pixels and pure bare soil pixels were determined according to land use types. This product excludes areas including lakes, rivers, glaciers and permanent snow cover. Specifically, the NDVI data used herein is derived from the 250 m resolution Normalized Difference Vegetation Index dataset (2000–2022) of China, released by the National Tibetan Plateau Scientific Data Center. Verified through spatiotemporal variation trend analysis, this dataset conforms to both temporal and spatial change patterns. The unit of vegetation coverage is 0.01%. This dataset can provide data reference for regional ecological quality assessment, important ecological space investigation and evaluation, and other related works.