## 3 Results and Discussion
### Analysis of Final Suitability Map Excluding Extreme-Temperature Regions
However, in the final suitability map, the differences in the area proportions between grades were relatively large, ranging from 2.6 to 4.5%p (Table 4). In the final suitability map, the area of the SS reclassified by EI was 58.72 ha, which was 0.4% of the total area, making it the smallest SS area among the four classification methods. The proportion of the SS increased by 0.1%p compared to the composite suitability map, but this difference was not considered significant. In contrast, the area proportion of USs decreased by 3.3%p, and the area proportion of the PUS also decreased by 0.9%p. However, even with the removal of extreme-temperature regions, the EI classification method still  
Figure 4: Final suitability maps based on various classification methods. (**a**) Natural Breaks (Jenks); (**b**) Quantile; (**c**) Equal Interval; (**d**) Geometric Interval. Green (SS), orange (PSS), blue (PUS), and red (US) colors indicate suitable, possibly suitable, probably unsuitable, and unsuitable sites, respectively. resulted in the combined area of the PUS and US, accounting for 70% of the total area (Table 4). This was likely due to the influence of the initial weighted sum map, which had a relatively high distribution of low scores (see Figure 2). In the final suitability map reclassified by GI, the SS was 1071.69 ha, which was 7.1% of the total area. Compared with the composite suitability map, the area proportions of the SS, PSS, and PUS increased by 1.1%p, 3.1%p, and 3.5%p, respectively, whereas the area proportion of the US decreased by 7.7%p. This represents the largest decrease in the area proportion among the four classification methods. This is likely because the GI reclassified the extreme-temperature regions, which had a high distribution of low scores in the initial weighted sum map, to a high proportion in the US. Additionally, similar to EI, the combined areas of the PUS and US accounted for 70% of the total area of GI (Table 4). In the final suitability map applying extreme-temperature factors, NB exhibited characteristics that maximized the differences between grades, as it effectively characterized the distribution of each factor [53]. In groundwater potential studies [54] and disaster-related fields such as landslide susceptibility studies [55] and flood vulnerability assessment studies [51], NB was also found to be the most suitable reclassification method. Qu reclassified the area of the SS at a relatively high rate, which can be considered a reclassification method for securing large areas for cultivation. In contrast, EI reclassified the SS and US areas at the lowest rate when compared with the other classification methods, making it a useful classification method when the strict selection of the SS is desired. The GI most accurately reflected areas with extreme temperatures, such as the US, because it tends to underestimate the weighted score when compared with other classification methods [51]. The application of extreme temperatures resulted in distinct differences in the distribution of area proportions by grade on the composite suitability map. This emphasizes the significant impact of extreme-temperature factors on the spatial distribution of the cultivation suitability grades. In addition, extreme temperatures can be a critical factor in effectively identifying suitable growth areas for GE and maximizing its viability.