[[["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"]],[],[],["This Landsat 7 dataset, provided by USGS, contains annual composites from 1999 to 2017, using Level L1T orthorectified scenes and top-of-atmosphere (TOA) reflectance. It focuses on the Normalized Difference Snow Index (NDSI), calculated from Green and Mid-IR bands to identify snow. Composites are created annually from all available scenes. The dataset is now complete and superseded by LANDSAT/LE07/C01/T1_ANNUAL_NDSI, and users should transition to the newer Collection 1-based dataset. Landsat data is public domain.\n"]]