L7 Irish Cloud Validation Masks

The scenes in this dataset were originally selected by Richard Irish, NASA-GSFC, and were derived manually from Landsat Enhanced Thematic Mapper Plus (ETM+) Level 1G scenes by Pat Scaramuzza and Michelle Bouchard at the USGS EROS Center. Its purpose is train and validate cloud masking algorithms. Each product is provided as a thematic raster, and includes the classes of “cloud”, “thin cloud”, “clear”, and “fill”. While these validation images were subjectively digitized by a single analyst, they provide useful information for quantifying the accuracy of clouds flagged by various cloud masking algorithms. Each mask is provided in GeoTIFF format, and includes all bands from the original Landsat Level-1 data (GeoTIFF), and its associated Level-1 metadata (MTL.txt file).本数据集的影像场景最初由美国国家航空航天局戈达德太空飞行中心（NASA-GSFC）的Richard Irish遴选，由美国地质调查局地球资源观测与科学中心（USGS EROS Center）的Pat Scaramuzza与Michelle Bouchard从陆地卫星增强型专题制图仪Plus（Landsat Enhanced Thematic Mapper Plus, ETM+）的1G级产品场景中手动提取得到。本数据集旨在用于云掩膜算法的训练与验证。每个产品以专题栅格形式提供，涵盖“云”“薄云”“晴空”与“填充”四类类别。尽管上述验证影像仅由单名分析人员主观数字化完成，但可为量化各类云掩膜算法标记云团的精度提供有效参考。每个云掩膜文件以GeoTIFF格式提供，包含原始陆地卫星Level-1数据的全部波段（存储为GeoTIFF文件）及其配套的Level-1元数据（MTL.txt文件）。