CSTR:11738.11.ncdc.hhstbc.db2561.2022
10.12072/ncdc.hhstbc.db2561.2024
<p>The vegetation cover data set of national key prevention areas of Tarim River in 2021 includes Aksu City, Wushi County, Awati County, Zepu County, Shache County, Yecheng County, Maigaiti County, Bachu County, Hotan City, Hotan County, Moyu County, Pishan County, Luopu County, Cele County, Yutian County, Minfeng County, Aheqi County, etc The vegetation coverage statistical table of alar city in 2021 is based on the processing of satellite remote sensing image with spatial resolution of 2m, and the storage format is xlsx. The data naming adopts the form of "key management area + year + vegetation coverage statistical table", such as“ ×× Key governance areas ×× Statistical table of annual vegetation coverage. The vegetation coverage is divided into five levels: high coverage, medium high coverage, medium coverage, medium low coverage and low coverage.</p>
<p>The data sources are ZY-3 and Gao FEN-1 satellite images, which are mainly obtained from the information center of the Ministry of water resources.</p>
<p>Based on the method of remote sensing estimation, the normalized vegetation index (NDVI) is used to estimate the vegetation coverage by using the pixel dichotomy model. The method is to first calculate the NDVI of each pixel using the near infrared band and red band data of multispectral images, and then use the model to calculate the vegetation coverage of the whole region. Then the land use type data from remote sensing interpretation and the vegetation coverage data from remote sensing estimation are superimposed to obtain the vegetation coverage information of each pixel. Finally, according to the classification rules, the vegetation coverage was classified, and the statistical table of forest and grass vegetation coverage was obtained.</p>
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