The land cover data set of Northwestern China includes land cover data of Xinjiang Uygur Autonomous Region, Qinghai Province, Gansu Province, Ningxia Hui Autonomous Region, Shaanxi Province and Alashan League of Inner Mongolia Autonomous Region in 1990, 2000, 2005 and 2010. The spatial resolution is 200 meters and the format is SHP. The data is named as 1:700000 land cover number of XX Province in Northwest China According to the collection. The classification system of land cover data is based on FAO classification system, which redefines the classification system suitable for regional characteristics and related application requirements, including 6 first-class and 33 second-class. The final coordinates and projection parameters of all the data are projected by double standard weft secant conic projection.
CSTR:11738.11.ncdc.nieer.2020.1357
10.12072/casnw.057.2018.db
<p>Data sources are Landsat TM and ETM + data, mainly from the United States Geological Survey (USGS, https://glovis.usgs.gov/ ）Access, a few from China geospatial data cloud（ http://www.gscloud.cn/ ）Get</p>
Based on eCognition software platform, the method of combining object-oriented computer automatic classification with manual visual interpretation was used to extract the land cover data of the fourth period in the study area. Finally, three methods are used to verify the accuracy of the data: field survey, high-resolution image recognition and Google Earth sample point recognition
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