Glacier outlines over the Qilian Mountain area (1980-2015)

This dataset contains the glacier outlines in Qilian Mountain Area from 1980 to 2015. The dataset was produced based on classical band ratio criterion and manual editing. Landsat images collected between 1978 and 2018 were used as basic data for glacier extraction. Google images and Map World images were employed as reference data for manual adjusting. The dataset was stored in SHP format and attached with the attributions of coordinates, glacier ID and glacier area. Consisting of 8 seasons, the dataset has a temporal resolution of 5 years and a spatial resolution of 30 meters. The accuracy is about 1 pixel (±30 meter). The dataset directly reflects the variation of glacier distribution within the Qilian Mountain in the past 35 years, and can be used for quantitative estimation of glacier mass balance and the quantitative assessment of glacier change’s impact on basin runoff.

该数据集包含1980年至2015年期间祁连山地区的冰川轮廓数据。数据集的生成基于经典波段比值法准则与人工编辑相结合的方式，冰川提取的基础数据为1978-2018年间采集的Landsat影像，人工调整阶段以Google影像和天地图（Map World）影像为参考数据。数据集以SHP格式存储，附带坐标、冰川ID及冰川面积等属性信息；包含8个时期，时间分辨率为5年，空间分辨率为30米，数据精度约为1个像素（±30米）。该数据集直接反映了过去35年间祁连山地区冰川分布的变化特征，可用于冰川物质平衡的定量估算及冰川变化对流域径流影响的定量评估。