Topographic data to support the analysis of error and uncertainty that degrade topographic corrections of remotely sensed data

Eight zip files comprise the dataset. Each set of files (Carson, Himachal Pradesh, Wrangell) contains digital elevation data for the same area but from different data sources. The finer-resolution data (3m for Carson, 8m for Himachal Pradesh, 5m for Wrangell) were derived, respectively, from airborne lidar, structure-from-motion from fine-resolution commercial satellite imagery, and airborne interferometric synthetic aperture radar. The coarser-resolution but globally available data are from the Copernicus DEM and the NASADEM (NDEM). The NASADEM extends to 60° North, so does not cover the Wrangell Mountains in Alaska; therefore in this region only the interoferometric SAR and Copernicus DEM are available. In each of the other two areas, DEM data from three sources are provided.本数据集包含8个压缩包文件。每组文件分别对应卡森（Carson）、喜马偕尔邦（Himachal Pradesh）、兰格尔（Wrangell）三个区域，各区域均包含来自不同数据源的本区域数字高程数据（digital elevation data）。其中，精细空间分辨率数据的空间分辨率分别为卡森区域3米、喜马偕尔邦区域8米、兰格尔区域5米，其数据源依次为机载激光雷达（airborne lidar）、基于高分辨率商业卫星影像的运动恢复结构（structure-from-motion）技术，以及机载干涉合成孔径雷达（airborne interferometric synthetic aperture radar）。而空间分辨率较低但可全球获取的数据，则来自哥白尼数字高程模型（Copernicus DEM）与美国国家航空航天局数字高程模型（NASADEM，简称NDEM）。由于NASADEM的覆盖范围仅至北纬60度，无法覆盖阿拉斯加州的兰格尔山脉，因此该区域仅可获取机载干涉合成孔径雷达数据与哥白尼数字高程模型数据。对于其余两个区域，则提供来自三类不同数据源的数字高程模型（DEM）数据。