In 2010, Xinjiang land cover data was independently completed by Xinjiang Institute of ecology and geography, Chinese Academy of Sciences. On the basis of 1:1 million Xinjiang land use data and remote sensing classification data, it was completed in a full digital way. The main data sources are: 1.1:1 million Xinjiang land use data; 2. 2010 TM data with a resolution of 30 meters; 3. DEM data with a resolution of 30 meters; 4 Auxiliary data: 1:1 million Xinjiang grassland resource data (vector), 1:1 million Xinjiang woodland resource data (vector); 5. The above data are from the accumulation of scientific research achievements over the years.

Under the environment of ERDAS, ecognition and ArcGIS, through the combination of expert analysis and remote sensing automatic classification, and with the results of field investigation, the interpretation accuracy is verified. According to the content and area, the method of thematic mapping is adopted. Main links: Based on 1:1 million Xinjiang land use data as the basic base map, as the frame data and control basis of mapping; Based on the TM image data within the time range of 1-2 years before and after 2010, the orthophoto map is generated by superposition of DEM data whose spatial grid accuracy is not less than 30 meters. The orthophoto map is interpreted by remote sensing image analysis software ecognition to realize the attribute division and mapping of different land cover types; On the basis of the above three kinds of data, combined with the results of artificial visual interpretation and field investigation, full digital mapping is carried out.

The results show that the total precision of the first class of land cover is 95%, the second class is 85%, the second class of forest and shrub is 85%, and the lowest precision of other single class is 65%; the total precision of the second class of each climate zone is 85%; the total precision of the second class of change detection is more than 72%, and the lowest precision of single class is 42%.