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Thailand’s Western Forest Complex (WEFCOM) to date has been the most effective area for the use of the Spatial Monitoring and Reporting Tool (SMART). The objective of this study was to apply the data obtained from the SMART system to develop and evaluate nine statistical models to estimate tiger distribution in the area. From the SMART database between 2012 and 2016, 2,118 presences of tigers. The categorical responses of digital elevation model, slope percentage and normalized difference vegetation index of WEFCOM were not significantly different from those of the SMART database (chi-square test; p = 0.2322 p = 0.2335 and p = 0.2313 respectively). This result suggested that the tiger presence data from the SMART database provided a good representation of the WEFCOM landscape. The random forest (RF) model was the most effective model. Using the RF model, only 18.72% of WEFCOM was classified as suitable habitat, which could be further classified into three patch types: common patches (1,824 km2), breeding patches (181 km2) and population-maintaining patches (1,502 km2). Moreover, it was found that many suitable habitat patches for tigers are located outside the WEFCOM and highly encroached by human activities. Therefore, it is important to take corrective actions and enforce the law seriously to reduce the long-term negative impact on the existence of tigers and preys.
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