The statistical table of forest and grass vegetation coverage in Heihe national key prevention area of Qilian Mountain in 2020 includes the statistical table of forest and grass vegetation coverage in Ejina Banner of Inner Mongolia Autonomous Region, Yongdeng County, Tianzhu County, Ganzhou District, Sunan County, Minle County, Linze County, Gaotai County and Jinta County of Gansu Province, Menyuan Hui Autonomous County and Qilian County of Qinghai Province in 2020, Based on the satellite remote sensing image with a spatial resolution of 2 meters, the data is stored in xlsx format, and named in the form of "key management area + year + statistical table of forest and grass vegetation coverage"“ ×× Key governance areas ×× Statistical table of annual forest and grass vegetation coverage. The vegetation coverage is divided into five levels: high coverage, medium high coverage, medium coverage, medium low coverage and low coverage.
|collect time||2020/01/01 - 2020/12/31|
|collect place||National key prevention area of Heihe River in Qilian Mountain|
|data size||722.8 KiB|
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.
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.
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