多源土地覆盖产品在中国西北干旱区的精度评价与一致性分析OA

Accurate land cover products are essential for understanding land use structure and spatial composition in the arid regions of northwest China.In this study,five high-resolution land cover products from 2020 were se-lected:the ESA global 10 m land cover product(ESA10),the ESRI global 10 m land cover product(ESRI10),the global 30 m land cover product(Globeland30),the global 30 m fine-classified land cover product(GLC_FCS30),and the China annual 30 m land cover product(CLCD).Precision assessments and consistency evaluations of these multi-source land cover products were conducted for the arid regions of northwest China from three per-spectives:classification accuracy,similarity in land cover composition,and classification consistency.The results indicate the following:(1)Among the five products,ESA10 achieved the highest classification accuracy(88.86%),whereas ESRI10 yielded a comparatively lower accuracy(69.69%).(2)The area correlation coeffi-cients across the five products ranged from 0.792 to 0.999,demonstrating strong agreement in characterizing land composition in the arid regions of northwest China.Bare land,grassland,and cultivated land constitute the domi-nant land cover types,collectively accounting for≥93.01%of the total area.(3)Classification consistency for bare land was the highest among the five products.The classification purity of any two-product combination reached up to 96.95%;the spatial consistency of bare land and cultivated land was also high,representing more than 56.39%of the area of the corresponding land cover types.Overall,ESA10 more accurately captured the land cover structure and spatial distribution compared with the other four products.These findings can provide a scien-tific basis for data selection in national land use planning and ecological conservation in the arid regions of north-west China.