Chamoli Disaster Pre-event 2-m DEM Composite: September 2015, Version 1

This data set contains a 2-m resolution DEM composite and auxiliary parameters over the Chamoli disaster area in Uttarakhand, India, where on 7 February 2021 a glacier burst led to a massive flood. This is the pre-event DEM constructed from monoscopic Maxar/DigitalGlobe WorldView-1 and WorldView-2 images collected in September 2015. A post-event DEM is available as a separate data set (https://nsidc.org/data/HMA2_CPOST).本数据集包含印度北阿坎德邦查莫利灾区的2米分辨率数字高程模型（Digital Elevation Model, DEM）合成产品与辅助参数。该区域于2021年2月7日发生冰川溃决事件，进而引发大规模洪水。本数据集为事件前DEM，由2015年9月采集的单景Maxar/DigitalGlobe WorldView-1及WorldView-2卫星影像构建而成。事后DEM可作为独立数据集获取，相关链接为https://nsidc.org/data/HMA2_CPOST。