The Shapotou National Nature Reserve in the Ningxia Hui Autonomous Region is a typical arid region in China. There is an exceptionally serious problem of surface water resource conservation, and dynamic monitoring of surface water with the help of water indices can help to elucidate its change patterns and impact mechanisms. Here, we analysed the characteristics of interannual variation in surface water area in the study area from 1992–2021. The correlation coefficients of the surface water area in the previous year and the contemporaneous water bodies of the Yellow River with the total surface water area (TSWA) were calculated. The results show the following: ① In terms of the classification accuracy of the two methods, water indices and support vector machine classification, water indices are more suitable for water body extraction in the study area. In particular, the three water indices, NDWI, MNDWI and AWEIsh, were more effective, with average overall accuracie
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Landsat Collection 2 U S Analysis Ready Data Now Available usgs.gov - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from usgs.gov Daily Mail and Mail on Sunday newspapers.
Looking Back: EROS Marks Major Milestones for 2020
Land Change Monitoring, Assessment, and Projection Learn More Release Date:
December 28, 2020
The year of 2020 will be remembered largely for the global coronavirus pandemic, and with good reason: The impact was worldwide, sustained and continues into the new year.
LCMAP Annual Land Cover Change (LCACHNG) product for an area over Portland, Oregon for product year 2005. Visit the LCMAP Collection 1 Science Products webpage for more information.
The year of 2020 will be remembered largely for the global coronavirus pandemic, and with good reason: The impact was worldwide, sustained and continues into the new year.
Despite the challenges presented by the virus and the remote work conditions under which many in the U.S. Geological Survey labored throughout 2020, the USGS Earth Resources Observation and Science (EROS) Center marked a series of historic milestones.