Abstract:

Based on the WESTDC_Land_Cover_Products 20 dataset which was reclassified as cropland,forestland,grassland,water,urban & rural builtup land and other unused land in terms of CAS resource and environment classification system,the land use quantitative structure and its spatial autocorrelation characteristic in the Yangtze River Basin were studied using 〖JP2〗GIS technique.The results showed that forestland〖JP〗,grassland and cropland were the dominating land use types which accounted for more than 90 percent of the basin’s total area,while the area of water,urban & rural builtup land and other unused land were 〖JP2〗extremely small.Different provinces and municipalities in the basin shared sharply different land use structures〖JP〗 which could be divided into four zones in connection with a certain land use spatial pattern.The provinces and municipalities with similar occupancy rate concerning all kinds of land use types globally clustered and adjoined in the basin,spatially autocorrelating significantly.But distribution centroid,pattern,spatial autocorrelation structure and regression characteristic 〖JP2〗were different in different land use types.Local spatial〖JP〗 autocorrelation for spatial distribution about all land use types in the basin resulted from HH clustering or LL 〖JP〗clustering,whereas spatial outlier was negligible.As a whole,the research demonstrated that the spatial distribution of all land use types were distinctly of attributes of spatial clustering and regionality in the basin.〖