[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["缺少我需要的資訊","missingTheInformationINeed","thumb-down"],["過於複雜/步驟過多","tooComplicatedTooManySteps","thumb-down"],["過時","outOfDate","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["示例/程式碼問題","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],[],[],["The Landsat 7 dataset, available from 1999-01-01 to 2021-12-19 via Google Earth Engine, provides 32-day Normalized Difference Snow Index (NDSI) composites. These composites, derived from Tier 1 orthorectified scenes, use top-of-atmosphere reflectance to identify snow based on its reflectance in visible and mid-IR bands. Each composite includes all images from the 32-day period, with the most recent pixel used. The dataset, publicly accessible, has an NDSI band with a 30-meter pixel size, and is provided by the USGS.\n"]]