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航天飞行中心（NASA-GSFC）的Richard Irish遴选，并由美国地质调查局地球资源观测中心（USGS EROS Center）的Pat Scaramuzza与Michelle Bouchard手动从陆地卫星增强型专题制图仪Plus（Enhanced Thematic Mapper Plus, ETM+）的1G级影像中提取得到。其核心用途为训练与验证云掩膜算法。每份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。尽管这些验证影像仅由一名分析人员主观数字化完成，但它们可为量化各类云掩膜算法标记云团的精度提供有效参考信息。每份掩膜采用GeoTIFF格式存储，包含原始Landsat 1级数据的全部波段文件（GeoTIFF格式）及其配套的1级元数据文件（MTL.txt）。