[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["没有我需要的信息","missingTheInformationINeed","thumb-down"],["太复杂/步骤太多","tooComplicatedTooManySteps","thumb-down"],["内容需要更新","outOfDate","thumb-down"],["翻译问题","translationIssue","thumb-down"],["示例/代码问题","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],[],[],["The Landsat 7 Collection 1 Tier 1 annual composites, available from 1999 to 2021 via Google Earth Engine, utilize the Normalized Difference Snow Index (NDSI) to identify snow, computed with Green and Mid-IR bands. These composites, derived from orthorectified scenes, incorporate top-of-atmosphere (TOA) reflectance. Data users must cite the USGS as the data source and have free access for research, education, and non-profit applications, following the USGS Visual Identity System Guidance. The data is accessble using `ee.ImageCollection(\"LANDSAT/LE07/C01/T1_ANNUAL_NDSI\")`.\n"]]