祁连山地区水体指数产品（2020）

本数据为祁连山地区2020年地表水体（包括液态水、冰川及多年积雪）分布产品。采用经典归一化水体指数法（Normalized Difference Water Index , NDWI）和人工修正的方法提取。原始基础数据为2020年祁连山全境的Landsat影像。参考数据为谷歌影像和哨兵2号影像。产品以shp文件格式存储，包含坐标系、水体面积等属性。产品为1期，时间分辨率为1年，空间分辨率为30米，边界精度在30米（一个像元）左右。该产品直观地反映了祁连山水体在2020年的大致分布，可用于流域水资源定量估计研究。

This dataset is the 2020 surface water body (including liquid water, glaciers and perennial snow) distribution product for the Qilian Mountains region. Extraction was performed using the classic Normalized Difference Water Index (NDWI) method combined with manual correction. The original foundational data are Landsat images covering the entire Qilian Mountains in 2020, while the reference data include Google Earth imagery and Sentinel-2 imagery. The product is stored in shp file format, with attributes such as coordinate system and water body area included. This is a single-temporal product, with a temporal resolution of 1 year, a spatial resolution of 30 meters, and a boundary accuracy of approximately 30 meters (one pixel). This product intuitively reflects the general distribution of water bodies in the Qilian Mountains in 2020, and can be applied to quantitative estimation research on watershed water resources.

搜集汇总

背景与挑战

背景概述

该数据集为祁连山地区2020年的地表水体分布产品，覆盖液态水、冰川及多年积雪，采用归一化水体指数法和人工修正方法基于Landsat影像提取，以shp格式存储，包含坐标系和水体面积等属性。其时间分辨率为1年，空间分辨率为30米，边界精度约30米，适用于流域水资源定量估计研究，直观反映了2020年祁连山水体的大致分布情况。