青藏高原Landsat系列卫星遥感归一化差值水体（NDWI）产品（1980s-2019）

1）数据内容：本数据集包含从1980s-2019年青藏高原地区Landsat长时序NDWI产品。2）数据来源及加工方法：主要是在青藏高原Landsat系列卫星地表反射率数据集的基础上，通过NDWI的计算公式进行生产的，即利用绿光波段和近红外波段的差异比值来增强水体信息，并减弱植被、土壤、建筑物等地物的信息；3）数据质量描述：为了标识云、冰雪，并相应生产了质量标识文件（QA）。4) 数据应用成果及前景：该指数便于地表水体信息有效提取，广泛应用于水资源、水文以及林农业等领域。

1) Data Content: This dataset includes long-time-series Landsat NDWI products over the Qinghai-Tibet Plateau from the 1980s to 2019.
2) Data Source and Processing Method: The dataset is primarily generated based on the Landsat surface reflectance dataset of the Qinghai-Tibet Plateau, following the NDWI calculation formula. Specifically, the difference ratio between the green band and near-infrared band is used to enhance water body information while suppressing signals from ground features such as vegetation, soil, and buildings.
3) Data Quality Description: To identify clouds, snow and ice, corresponding quality assessment (QA) files have been produced.
4) Data Application Achievements and Prospects: This index facilitates effective extraction of surface water body information, and has been widely applied in fields including water resources, hydrology, forestry and agriculture.

搜集汇总

背景与挑战

背景概述

该数据集提供了青藏高原地区从1980年代至2019年的Landsat系列卫星遥感归一化差值水体（NDWI）产品，具有月时间分辨率和10米至100米的空间分辨率，数据总量为5.62 TB，以开放获取方式共享。它基于地表反射率数据通过NDWI公式计算，旨在增强水体信息并减弱植被、土壤等干扰，同时包含质量标识文件用于云和冰雪识别，广泛应用于水资源、水文及林农业等领域的研究。