Figure 6 Multidimensional clustering of the agricultural sustainable zones (a. 2030; b. 2050; c. Data distribution of SSP1, SSP2, SSP3, and SSP5 in 2030 sustainable development zoning; d. Correlations of the indicators; e. Data distribution of SSP1, SSP2, SSP3, and SSP5 in 2050 sustainable development zoning)